/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:00:56,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:00:56,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:00:56,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:00:56,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 21:00:56,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 21:00:56,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 21:00:56,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 21:00:56,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 21:00:56,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 21:00:56,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 21:00:56,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 21:00:56,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 21:00:56,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 21:00:56,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 21:00:56,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 21:00:56,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 21:00:56,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 21:00:56,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 21:00:56,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 21:00:56,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 21:00:56,204 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:00:56,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:00:56,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:00:56,205 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:00:56,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:00:56,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:00:56,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:00:56,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:00:56,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:00:56,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:00:56,206 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:00:56,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:00:56,206 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:00:56,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:00:56,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:00:56,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:00:56,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:00:56,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:00:56,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:00:56,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:00:56,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:00:56,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:00:56,208 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:00:56,208 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:00:56,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:00:56,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:00:56,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:00:56,437 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:00:56,438 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:00:56,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2022-01-31 21:00:56,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4844fae6c/914bc2ef214042e0a04b128b7aaab238/FLAGaa57cfc77 [2022-01-31 21:00:56,877 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:00:56,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2022-01-31 21:00:56,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4844fae6c/914bc2ef214042e0a04b128b7aaab238/FLAGaa57cfc77 [2022-01-31 21:00:57,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4844fae6c/914bc2ef214042e0a04b128b7aaab238 [2022-01-31 21:00:57,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:00:57,308 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:00:57,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:00:57,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:00:57,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:00:57,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:00:57" (1/1) ... [2022-01-31 21:00:57,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38695ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57, skipping insertion in model container [2022-01-31 21:00:57,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:00:57" (1/1) ... [2022-01-31 21:00:57,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:00:57,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:00:57,442 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i[895,908] [2022-01-31 21:00:57,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:00:57,473 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:00:57,486 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i[895,908] [2022-01-31 21:00:57,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:00:57,498 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:00:57,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57 WrapperNode [2022-01-31 21:00:57,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:00:57,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:00:57,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:00:57,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:00:57,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57" (1/1) ... [2022-01-31 21:00:57,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57" (1/1) ... [2022-01-31 21:00:57,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57" (1/1) ... [2022-01-31 21:00:57,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57" (1/1) ... [2022-01-31 21:00:57,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57" (1/1) ... [2022-01-31 21:00:57,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57" (1/1) ... [2022-01-31 21:00:57,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57" (1/1) ... [2022-01-31 21:00:57,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:00:57,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:00:57,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:00:57,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:00:57,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57" (1/1) ... [2022-01-31 21:00:57,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:00:57,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:00:57,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 21:00:57,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 21:00:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:00:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:00:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:00:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 21:00:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 21:00:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:00:57,588 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 21:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 21:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 21:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 21:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:00:57,639 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:00:57,640 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:00:57,727 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:00:57,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:00:57,731 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 21:00:57,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:00:57 BoogieIcfgContainer [2022-01-31 21:00:57,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:00:57,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:00:57,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:00:57,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:00:57,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:00:57" (1/3) ... [2022-01-31 21:00:57,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4f6220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:00:57, skipping insertion in model container [2022-01-31 21:00:57,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:00:57" (2/3) ... [2022-01-31 21:00:57,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4f6220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:00:57, skipping insertion in model container [2022-01-31 21:00:57,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:00:57" (3/3) ... [2022-01-31 21:00:57,739 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2022-01-31 21:00:57,743 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:00:57,743 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:00:57,789 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:00:57,802 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 21:00:57,802 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:00:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 21:00:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 21:00:57,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:57,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:57,828 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:57,832 INFO L85 PathProgramCache]: Analyzing trace with hash -915508507, now seen corresponding path program 1 times [2022-01-31 21:00:57,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:57,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088433139] [2022-01-31 21:00:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:57,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:57,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:00:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:58,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:58,019 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:58,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088433139] [2022-01-31 21:00:58,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088433139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:58,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:58,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 21:00:58,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465477031] [2022-01-31 21:00:58,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:58,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 21:00:58,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 21:00:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 21:00:58,078 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:58,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:58,132 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-01-31 21:00:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 21:00:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 21:00:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:58,140 INFO L225 Difference]: With dead ends: 35 [2022-01-31 21:00:58,140 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 21:00:58,142 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 21:00:58,145 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:58,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:00:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 21:00:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 21:00:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:00:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-31 21:00:58,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-01-31 21:00:58,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:58,176 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-31 21:00:58,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-31 21:00:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 21:00:58,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:58,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:58,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:00:58,177 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash -925667238, now seen corresponding path program 1 times [2022-01-31 21:00:58,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:58,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993149516] [2022-01-31 21:00:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:58,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:58,181 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:00:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:58,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:58,274 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:58,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993149516] [2022-01-31 21:00:58,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993149516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:58,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:58,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:00:58,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498480754] [2022-01-31 21:00:58,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:58,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 21:00:58,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:58,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 21:00:58,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 21:00:58,277 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:58,400 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 21:00:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 21:00:58,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 21:00:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:58,402 INFO L225 Difference]: With dead ends: 28 [2022-01-31 21:00:58,402 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 21:00:58,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:00:58,404 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:58,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:00:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 21:00:58,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-01-31 21:00:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 21:00:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-01-31 21:00:58,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-01-31 21:00:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:58,418 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-01-31 21:00:58,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-01-31 21:00:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 21:00:58,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:58,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:58,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:00:58,419 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:58,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:58,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1147629988, now seen corresponding path program 1 times [2022-01-31 21:00:58,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:58,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679262312] [2022-01-31 21:00:58,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:58,615 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:58,616 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:58,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:58,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:58,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:58,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679262312] [2022-01-31 21:00:58,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1679262312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:58,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:58,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:00:58,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611206512] [2022-01-31 21:00:58,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:58,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:00:58,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:00:58,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:00:58,915 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:59,269 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-01-31 21:00:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:00:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 21:00:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:59,274 INFO L225 Difference]: With dead ends: 46 [2022-01-31 21:00:59,274 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 21:00:59,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:00:59,277 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:59,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 40 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:00:59,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 21:00:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-01-31 21:00:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 21:00:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-01-31 21:00:59,296 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2022-01-31 21:00:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:59,296 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-01-31 21:00:59,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-01-31 21:00:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 21:00:59,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:59,298 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:59,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:00:59,298 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:59,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:59,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1885482061, now seen corresponding path program 1 times [2022-01-31 21:00:59,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:59,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087303101] [2022-01-31 21:00:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:59,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:59,307 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:00:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:59,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:59,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 21:00:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:59,389 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:59,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087303101] [2022-01-31 21:00:59,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087303101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:59,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:59,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 21:00:59,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115625556] [2022-01-31 21:00:59,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:59,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 21:00:59,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:59,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 21:00:59,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:00:59,404 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:00:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:59,509 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-01-31 21:00:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 21:00:59,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-01-31 21:00:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:59,512 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:00:59,512 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 21:00:59,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:00:59,524 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:59,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 34 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:00:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 21:00:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-01-31 21:00:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 21:00:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-01-31 21:00:59,539 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 16 [2022-01-31 21:00:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:59,540 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-01-31 21:00:59,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:00:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-01-31 21:00:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 21:00:59,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:59,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:59,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:00:59,542 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:59,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1699353956, now seen corresponding path program 1 times [2022-01-31 21:00:59,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:59,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005929067] [2022-01-31 21:00:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:59,615 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:59,737 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:59,737 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:00:59,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:00:59,738 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:00:59,738 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:00:59,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:59,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:59,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005929067] [2022-01-31 21:00:59,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2005929067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:59,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:59,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:00:59,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165224197] [2022-01-31 21:00:59,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:59,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:00:59,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:59,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:00:59,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:00:59,925 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:00,215 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-01-31 21:01:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:01:00,218 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 21:01:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:00,226 INFO L225 Difference]: With dead ends: 48 [2022-01-31 21:01:00,227 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 21:01:00,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:01:00,230 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:00,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 66 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:01:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 21:01:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-01-31 21:01:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-01-31 21:01:00,239 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2022-01-31 21:01:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:00,239 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-01-31 21:01:00,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-01-31 21:01:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 21:01:00,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:00,240 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:00,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 21:01:00,241 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash -958875614, now seen corresponding path program 2 times [2022-01-31 21:01:00,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:00,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494796669] [2022-01-31 21:01:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:00,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:00,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:00,411 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:00,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:00,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:00,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:00,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:00,413 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:00,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:00,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:00,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:00,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494796669] [2022-01-31 21:01:00,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1494796669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:00,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:00,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:01:00,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161296404] [2022-01-31 21:01:00,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:00,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:01:00,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:00,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:01:00,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:01:00,644 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:00,924 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-01-31 21:01:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:01:00,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 21:01:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:00,925 INFO L225 Difference]: With dead ends: 42 [2022-01-31 21:01:00,925 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 21:01:00,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:01:00,927 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:00,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 62 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:01:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 21:01:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-31 21:01:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-31 21:01:00,933 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2022-01-31 21:01:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:00,934 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-31 21:01:00,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-31 21:01:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 21:01:00,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:00,935 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:00,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 21:01:00,935 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash 816131748, now seen corresponding path program 3 times [2022-01-31 21:01:00,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:00,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818958933] [2022-01-31 21:01:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:00,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:01,085 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:01,085 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:01,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:01,086 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:01,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:01,086 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:01,087 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:01,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:01,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:01,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:01,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818958933] [2022-01-31 21:01:01,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1818958933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:01,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:01,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:01:01,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010025509] [2022-01-31 21:01:01,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:01,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:01:01,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:01,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:01:01,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:01:01,322 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:01,642 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-01-31 21:01:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:01:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 21:01:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:01,645 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:01:01,645 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 21:01:01,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:01:01,646 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:01,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 62 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:01:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 21:01:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-01-31 21:01:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-31 21:01:01,652 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2022-01-31 21:01:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:01,652 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-31 21:01:01,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-31 21:01:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 21:01:01,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:01,653 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:01,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 21:01:01,653 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1454386014, now seen corresponding path program 4 times [2022-01-31 21:01:01,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:01,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722752568] [2022-01-31 21:01:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:01,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:01,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:01,786 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:01,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:01,786 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:01,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:01,787 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:01,788 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:01,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:01,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:01,875 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 21:01:02,018 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:02,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722752568] [2022-01-31 21:01:02,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [722752568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:02,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:02,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:01:02,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362933033] [2022-01-31 21:01:02,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:02,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:01:02,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:01:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:01:02,020 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:02,251 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-01-31 21:01:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:01:02,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 21:01:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:02,252 INFO L225 Difference]: With dead ends: 40 [2022-01-31 21:01:02,252 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 21:01:02,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:01:02,253 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:02,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 50 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:01:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 21:01:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-01-31 21:01:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-31 21:01:02,259 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 23 [2022-01-31 21:01:02,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:02,259 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-31 21:01:02,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-31 21:01:02,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 21:01:02,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:02,260 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:02,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 21:01:02,260 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash -713648358, now seen corresponding path program 5 times [2022-01-31 21:01:02,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:02,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758889025] [2022-01-31 21:01:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:02,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:02,395 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:02,395 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:02,395 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:02,395 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:02,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:02,396 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:02,396 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:02,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:02,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:02,446 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 21:01:02,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:02,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758889025] [2022-01-31 21:01:02,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758889025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:02,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:02,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:01:02,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626468161] [2022-01-31 21:01:02,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:02,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:01:02,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:01:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:01:02,630 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:02,989 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-01-31 21:01:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:01:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 21:01:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:02,990 INFO L225 Difference]: With dead ends: 50 [2022-01-31 21:01:02,990 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 21:01:02,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:01:02,991 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:02,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 64 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:01:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 21:01:02,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-01-31 21:01:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 32 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-01-31 21:01:02,998 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 23 [2022-01-31 21:01:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:02,998 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-01-31 21:01:02,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-01-31 21:01:02,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 21:01:02,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:02,999 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:02,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 21:01:02,999 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1061359004, now seen corresponding path program 6 times [2022-01-31 21:01:02,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:03,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610071331] [2022-01-31 21:01:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:03,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:03,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:03,122 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:03,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:03,123 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:03,123 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:03,123 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:03,123 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:03,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:03,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:03,367 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:03,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610071331] [2022-01-31 21:01:03,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [610071331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:03,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:03,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:01:03,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116914337] [2022-01-31 21:01:03,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:03,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:01:03,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:01:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:01:03,369 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:03,777 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-01-31 21:01:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:01:03,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 21:01:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:03,780 INFO L225 Difference]: With dead ends: 51 [2022-01-31 21:01:03,780 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 21:01:03,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:01:03,781 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:03,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 78 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:01:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 21:01:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-31 21:01:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.34375) internal successors, (43), 34 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-01-31 21:01:03,789 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 23 [2022-01-31 21:01:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:03,789 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-01-31 21:01:03,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-01-31 21:01:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:01:03,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:03,790 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:03,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 21:01:03,790 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:03,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1280199014, now seen corresponding path program 7 times [2022-01-31 21:01:03,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:03,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015405540] [2022-01-31 21:01:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:03,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:03,914 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:03,915 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:03,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:03,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:03,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:03,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:03,916 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:03,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:03,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:03,965 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 21:01:04,149 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:04,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015405540] [2022-01-31 21:01:04,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2015405540] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:04,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:04,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:01:04,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428041278] [2022-01-31 21:01:04,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:04,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:01:04,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:01:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:01:04,151 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:04,433 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-01-31 21:01:04,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:01:04,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:01:04,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:04,434 INFO L225 Difference]: With dead ends: 47 [2022-01-31 21:01:04,434 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 21:01:04,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:01:04,435 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:04,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 56 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:01:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 21:01:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 21:01:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.3125) internal successors, (42), 34 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-01-31 21:01:04,442 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 26 [2022-01-31 21:01:04,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:04,442 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-01-31 21:01:04,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-01-31 21:01:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:01:04,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:04,443 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:04,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 21:01:04,443 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash -887835358, now seen corresponding path program 8 times [2022-01-31 21:01:04,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:04,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239402621] [2022-01-31 21:01:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:04,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:04,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:04,578 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:04,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:04,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:04,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:04,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:04,579 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:04,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:04,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:04,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:04,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239402621] [2022-01-31 21:01:04,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239402621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:04,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:04,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:01:04,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932640369] [2022-01-31 21:01:04,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:04,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:01:04,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:04,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:01:04,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:01:04,839 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 21:01:05,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:05,292 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-01-31 21:01:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:01:05,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 26 [2022-01-31 21:01:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:05,297 INFO L225 Difference]: With dead ends: 67 [2022-01-31 21:01:05,297 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 21:01:05,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:01:05,298 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:05,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 86 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 21:01:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-01-31 21:01:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 46 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2022-01-31 21:01:05,308 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 26 [2022-01-31 21:01:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:05,309 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2022-01-31 21:01:05,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 21:01:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2022-01-31 21:01:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:01:05,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:05,309 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:05,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 21:01:05,310 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:05,310 INFO L85 PathProgramCache]: Analyzing trace with hash 887172004, now seen corresponding path program 9 times [2022-01-31 21:01:05,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:05,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784616958] [2022-01-31 21:01:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:05,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:05,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:05,401 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:05,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:05,401 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:05,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:05,402 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:05,402 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:05,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:05,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:05,679 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:05,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784616958] [2022-01-31 21:01:05,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784616958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:05,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:05,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:01:05,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002840515] [2022-01-31 21:01:05,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:05,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:01:05,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:01:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:01:05,680 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:06,217 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-01-31 21:01:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:01:06,217 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:01:06,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:06,218 INFO L225 Difference]: With dead ends: 66 [2022-01-31 21:01:06,218 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 21:01:06,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:01:06,220 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:06,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 94 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 21:01:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-01-31 21:01:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 48 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-01-31 21:01:06,231 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 26 [2022-01-31 21:01:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:06,232 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-01-31 21:01:06,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-01-31 21:01:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 21:01:06,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:06,233 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:06,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 21:01:06,233 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:06,233 INFO L85 PathProgramCache]: Analyzing trace with hash 589554586, now seen corresponding path program 10 times [2022-01-31 21:01:06,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:06,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134730246] [2022-01-31 21:01:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:06,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:06,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:06,366 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:06,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:06,366 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:06,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:06,366 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:06,366 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:06,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:06,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:06,606 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:06,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134730246] [2022-01-31 21:01:06,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1134730246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:06,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:06,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:01:06,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998008359] [2022-01-31 21:01:06,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:06,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:01:06,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:06,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:01:06,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:01:06,608 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:06,879 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2022-01-31 21:01:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:01:06,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 21:01:06,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:06,880 INFO L225 Difference]: With dead ends: 61 [2022-01-31 21:01:06,880 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 21:01:06,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:01:06,882 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:06,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 60 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:01:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 21:01:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2022-01-31 21:01:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.368421052631579) internal successors, (52), 40 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-01-31 21:01:06,890 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 29 [2022-01-31 21:01:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:06,890 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-01-31 21:01:06,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-01-31 21:01:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 21:01:06,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:06,891 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:06,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 21:01:06,891 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash 395775582, now seen corresponding path program 11 times [2022-01-31 21:01:06,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:06,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754247152] [2022-01-31 21:01:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:06,941 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:07,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:07,021 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:07,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:07,022 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:07,022 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:07,022 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:07,022 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:07,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:07,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:07,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:07,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754247152] [2022-01-31 21:01:07,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [754247152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:07,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:07,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:01:07,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943272691] [2022-01-31 21:01:07,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:07,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:01:07,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:01:07,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:01:07,282 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 21:01:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:07,664 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-01-31 21:01:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:01:07,664 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 29 [2022-01-31 21:01:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:07,665 INFO L225 Difference]: With dead ends: 54 [2022-01-31 21:01:07,665 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 21:01:07,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:01:07,666 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:07,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 72 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:01:07,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 21:01:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-01-31 21:01:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 40 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-01-31 21:01:07,675 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2022-01-31 21:01:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:07,675 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-01-31 21:01:07,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 21:01:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-01-31 21:01:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 21:01:07,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:07,676 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:07,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 21:01:07,676 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:07,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:07,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1772258790, now seen corresponding path program 12 times [2022-01-31 21:01:07,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:07,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634476862] [2022-01-31 21:01:07,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:07,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:07,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:07,790 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:07,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:07,790 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:07,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:07,791 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:07,791 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:07,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:07,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:08,109 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:08,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634476862] [2022-01-31 21:01:08,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1634476862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:08,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:08,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:01:08,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52423739] [2022-01-31 21:01:08,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:08,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:01:08,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:08,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:01:08,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:01:08,110 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:08,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:08,638 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-01-31 21:01:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:01:08,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 21:01:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:08,639 INFO L225 Difference]: With dead ends: 79 [2022-01-31 21:01:08,639 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 21:01:08,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:01:08,641 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:08,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 103 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 21:01:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2022-01-31 21:01:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 55 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 82 transitions. [2022-01-31 21:01:08,652 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 82 transitions. Word has length 29 [2022-01-31 21:01:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:08,653 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 82 transitions. [2022-01-31 21:01:08,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 82 transitions. [2022-01-31 21:01:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 21:01:08,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:08,654 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:08,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 21:01:08,654 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:08,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:08,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2748572, now seen corresponding path program 13 times [2022-01-31 21:01:08,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:08,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399700806] [2022-01-31 21:01:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:08,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:08,767 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:08,767 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:08,767 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:08,767 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:08,768 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:08,768 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:08,768 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:08,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:08,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:09,091 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399700806] [2022-01-31 21:01:09,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399700806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:09,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:09,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:01:09,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368629921] [2022-01-31 21:01:09,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:09,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:01:09,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:09,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:01:09,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:01:09,092 INFO L87 Difference]: Start difference. First operand 61 states and 82 transitions. Second operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:09,629 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2022-01-31 21:01:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:01:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 21:01:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:09,632 INFO L225 Difference]: With dead ends: 76 [2022-01-31 21:01:09,632 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 21:01:09,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=2139, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:01:09,633 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:09,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 100 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 21:01:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-01-31 21:01:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.4) internal successors, (77), 57 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2022-01-31 21:01:09,647 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 29 [2022-01-31 21:01:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:09,647 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2022-01-31 21:01:09,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2022-01-31 21:01:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:01:09,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:09,648 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:09,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 21:01:09,648 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:09,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:09,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1939514462, now seen corresponding path program 14 times [2022-01-31 21:01:09,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:09,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568615350] [2022-01-31 21:01:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:09,702 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:09,770 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:09,771 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:09,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:09,771 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:09,772 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:09,772 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:09,772 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:09,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:09,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:10,062 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:10,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568615350] [2022-01-31 21:01:10,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568615350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:10,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:10,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:01:10,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230464606] [2022-01-31 21:01:10,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:10,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:01:10,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:10,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:01:10,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:01:10,065 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 21:01:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:10,403 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2022-01-31 21:01:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:01:10,404 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 32 [2022-01-31 21:01:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:10,404 INFO L225 Difference]: With dead ends: 71 [2022-01-31 21:01:10,404 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 21:01:10,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:01:10,405 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:10,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 71 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:01:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 21:01:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-01-31 21:01:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 57 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-01-31 21:01:10,418 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 32 [2022-01-31 21:01:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:10,421 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-01-31 21:01:10,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 21:01:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-01-31 21:01:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:01:10,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:10,424 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:10,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 21:01:10,424 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:10,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2133293466, now seen corresponding path program 15 times [2022-01-31 21:01:10,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:10,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539171576] [2022-01-31 21:01:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:10,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:10,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:10,520 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:10,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:10,521 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:10,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:10,521 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:10,521 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:10,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:10,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:10,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:10,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539171576] [2022-01-31 21:01:10,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [539171576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:10,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:10,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:01:10,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643966390] [2022-01-31 21:01:10,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:10,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:01:10,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:10,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:01:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:01:10,899 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:11,416 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2022-01-31 21:01:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:01:11,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:01:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:11,417 INFO L225 Difference]: With dead ends: 72 [2022-01-31 21:01:11,417 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 21:01:11,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:01:11,419 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:11,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 103 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 21:01:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-01-31 21:01:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 57 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-01-31 21:01:11,429 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2022-01-31 21:01:11,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:11,429 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-01-31 21:01:11,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-01-31 21:01:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:01:11,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:11,430 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:11,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 21:01:11,430 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash -6360542, now seen corresponding path program 16 times [2022-01-31 21:01:11,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:11,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032398828] [2022-01-31 21:01:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:11,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:11,543 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:11,543 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:11,543 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:11,543 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:11,543 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:11,543 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:11,543 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:11,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:11,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:11,910 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:11,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032398828] [2022-01-31 21:01:11,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1032398828] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:11,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:11,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:01:11,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189076421] [2022-01-31 21:01:11,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:11,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:01:11,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:11,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:01:11,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:01:11,911 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:12,508 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2022-01-31 21:01:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:01:12,509 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:01:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:12,510 INFO L225 Difference]: With dead ends: 102 [2022-01-31 21:01:12,510 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 21:01:12,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:01:12,511 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:12,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 105 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 21:01:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2022-01-31 21:01:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.4246575342465753) internal successors, (104), 75 states have internal predecessors, (104), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 111 transitions. [2022-01-31 21:01:12,523 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 111 transitions. Word has length 32 [2022-01-31 21:01:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:12,523 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 111 transitions. [2022-01-31 21:01:12,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:12,523 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 111 transitions. [2022-01-31 21:01:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:01:12,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:12,524 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:12,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 21:01:12,524 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:12,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1768646820, now seen corresponding path program 17 times [2022-01-31 21:01:12,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:12,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379436798] [2022-01-31 21:01:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:12,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:12,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:12,626 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:12,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:12,626 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:12,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:12,626 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:12,626 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:12,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:12,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:13,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:13,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379436798] [2022-01-31 21:01:13,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1379436798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:13,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:13,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:01:13,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601414133] [2022-01-31 21:01:13,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:13,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:01:13,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:01:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:01:13,005 INFO L87 Difference]: Start difference. First operand 81 states and 111 transitions. Second operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 26 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 21:01:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:13,580 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-01-31 21:01:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:01:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 26 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 21:01:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:13,581 INFO L225 Difference]: With dead ends: 97 [2022-01-31 21:01:13,581 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 21:01:13,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=2730, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:01:13,582 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:13,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 91 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 21:01:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2022-01-31 21:01:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 77 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2022-01-31 21:01:13,597 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 32 [2022-01-31 21:01:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:13,597 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2022-01-31 21:01:13,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 26 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 21:01:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2022-01-31 21:01:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 21:01:13,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:13,598 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:13,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 21:01:13,598 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:13,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:13,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1610012638, now seen corresponding path program 18 times [2022-01-31 21:01:13,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:13,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060214176] [2022-01-31 21:01:13,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:13,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:13,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:13,707 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:13,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:13,707 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:13,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:13,708 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:13,708 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:13,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:13,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:13,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:13,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060214176] [2022-01-31 21:01:13,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2060214176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:13,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:13,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:01:13,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651878857] [2022-01-31 21:01:13,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:13,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:01:13,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:13,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:01:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:01:13,976 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 21:01:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:14,291 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2022-01-31 21:01:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:01:14,293 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 35 [2022-01-31 21:01:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:14,293 INFO L225 Difference]: With dead ends: 90 [2022-01-31 21:01:14,293 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 21:01:14,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:01:14,294 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:14,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 70 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:01:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 21:01:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2022-01-31 21:01:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.421875) internal successors, (91), 66 states have internal predecessors, (91), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2022-01-31 21:01:14,304 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 35 [2022-01-31 21:01:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:14,304 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2022-01-31 21:01:14,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 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 21:01:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2022-01-31 21:01:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 21:01:14,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:14,305 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:14,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 21:01:14,305 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:14,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1175750298, now seen corresponding path program 19 times [2022-01-31 21:01:14,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:14,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107203913] [2022-01-31 21:01:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:14,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:14,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:14,425 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:14,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:14,425 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:14,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:14,426 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:14,426 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:14,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:14,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:14,711 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:14,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107203913] [2022-01-31 21:01:14,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2107203913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:14,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:14,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:01:14,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256863761] [2022-01-31 21:01:14,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:14,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:01:14,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:14,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:01:14,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:01:14,712 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:15,167 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2022-01-31 21:01:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:01:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 21:01:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:15,168 INFO L225 Difference]: With dead ends: 81 [2022-01-31 21:01:15,168 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 21:01:15,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:01:15,169 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:15,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 72 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:01:15,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 21:01:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-01-31 21:01:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.40625) internal successors, (90), 66 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2022-01-31 21:01:15,181 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 35 [2022-01-31 21:01:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:15,181 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2022-01-31 21:01:15,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2022-01-31 21:01:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 21:01:15,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:15,182 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:15,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 21:01:15,182 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:15,183 INFO L85 PathProgramCache]: Analyzing trace with hash 981971294, now seen corresponding path program 20 times [2022-01-31 21:01:15,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:15,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276935323] [2022-01-31 21:01:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:15,213 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:15,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:15,285 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:15,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:15,286 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:15,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:15,286 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:15,286 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:15,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:15,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:15,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:15,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276935323] [2022-01-31 21:01:15,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1276935323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:15,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:15,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:01:15,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323573544] [2022-01-31 21:01:15,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:15,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:01:15,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:01:15,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:01:15,631 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:16,193 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2022-01-31 21:01:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:01:16,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 21:01:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:16,194 INFO L225 Difference]: With dead ends: 82 [2022-01-31 21:01:16,194 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 21:01:16,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:01:16,196 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:16,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 114 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 21:01:16,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-01-31 21:01:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.390625) internal successors, (89), 66 states have internal predecessors, (89), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2022-01-31 21:01:16,207 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 35 [2022-01-31 21:01:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:16,207 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2022-01-31 21:01:16,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2022-01-31 21:01:16,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 21:01:16,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:16,208 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:16,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 21:01:16,208 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:16,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1186063078, now seen corresponding path program 21 times [2022-01-31 21:01:16,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:16,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705905987] [2022-01-31 21:01:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:16,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:16,295 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:16,296 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:16,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:16,296 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:16,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:16,296 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:16,296 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:16,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:16,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:16,686 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:16,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705905987] [2022-01-31 21:01:16,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [705905987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:16,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:16,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:01:16,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722685260] [2022-01-31 21:01:16,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:16,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:01:16,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:01:16,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:01:16,687 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:17,450 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2022-01-31 21:01:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:01:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 35 [2022-01-31 21:01:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:17,451 INFO L225 Difference]: With dead ends: 117 [2022-01-31 21:01:17,451 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 21:01:17,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=2947, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:01:17,453 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:17,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 117 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:01:17,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 21:01:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2022-01-31 21:01:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.4470588235294117) internal successors, (123), 87 states have internal predecessors, (123), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 130 transitions. [2022-01-31 21:01:17,468 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 130 transitions. Word has length 35 [2022-01-31 21:01:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:17,469 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 130 transitions. [2022-01-31 21:01:17,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 130 transitions. [2022-01-31 21:01:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 21:01:17,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:17,469 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:17,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 21:01:17,469 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash 588944284, now seen corresponding path program 22 times [2022-01-31 21:01:17,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:17,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764331498] [2022-01-31 21:01:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:17,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:17,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:17,585 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:17,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:17,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:17,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:17,586 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:17,586 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:17,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:17,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:17,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:17,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764331498] [2022-01-31 21:01:17,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1764331498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:17,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:17,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:01:17,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64469520] [2022-01-31 21:01:17,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:17,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:01:17,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:17,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:01:17,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:01:17,976 INFO L87 Difference]: Start difference. First operand 93 states and 130 transitions. Second operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 29 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 21:01:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:18,859 INFO L93 Difference]: Finished difference Result 110 states and 149 transitions. [2022-01-31 21:01:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:01:18,860 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 21:01:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:18,860 INFO L225 Difference]: With dead ends: 110 [2022-01-31 21:01:18,860 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 21:01:18,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=3395, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:01:18,862 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:18,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 127 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:01:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 21:01:18,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2022-01-31 21:01:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.4367816091954022) internal successors, (125), 89 states have internal predecessors, (125), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:18,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 132 transitions. [2022-01-31 21:01:18,879 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 132 transitions. Word has length 35 [2022-01-31 21:01:18,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:18,880 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 132 transitions. [2022-01-31 21:01:18,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 29 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 21:01:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 132 transitions. [2022-01-31 21:01:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:01:18,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:18,880 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:18,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 21:01:18,880 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:18,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1485821466, now seen corresponding path program 23 times [2022-01-31 21:01:18,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:18,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127189563] [2022-01-31 21:01:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:18,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:18,989 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:18,989 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:18,989 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:18,990 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:18,990 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:18,990 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:18,990 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:18,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:19,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:19,279 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:19,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127189563] [2022-01-31 21:01:19,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2127189563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:19,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:19,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:01:19,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073290499] [2022-01-31 21:01:19,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:19,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:01:19,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:19,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:01:19,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:01:19,280 INFO L87 Difference]: Start difference. First operand 95 states and 132 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:19,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:19,667 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2022-01-31 21:01:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:01:19,667 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:01:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:19,668 INFO L225 Difference]: With dead ends: 103 [2022-01-31 21:01:19,668 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 21:01:19,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:01:19,669 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:19,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 81 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:01:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 21:01:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-01-31 21:01:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 89 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 131 transitions. [2022-01-31 21:01:19,682 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 131 transitions. Word has length 38 [2022-01-31 21:01:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:19,683 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 131 transitions. [2022-01-31 21:01:19,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 131 transitions. [2022-01-31 21:01:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:01:19,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:19,683 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:19,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 21:01:19,683 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:19,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1920083806, now seen corresponding path program 24 times [2022-01-31 21:01:19,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:19,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193160856] [2022-01-31 21:01:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:19,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:19,799 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:19,800 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:19,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:19,800 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:19,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:19,800 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:19,800 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:19,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:19,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:20,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:20,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193160856] [2022-01-31 21:01:20,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193160856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:20,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:20,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:01:20,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224242559] [2022-01-31 21:01:20,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:20,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:01:20,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:01:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:01:20,184 INFO L87 Difference]: Start difference. First operand 95 states and 131 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:20,726 INFO L93 Difference]: Finished difference Result 105 states and 140 transitions. [2022-01-31 21:01:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:01:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:01:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:20,727 INFO L225 Difference]: With dead ends: 105 [2022-01-31 21:01:20,727 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 21:01:20,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:01:20,729 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:20,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 83 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:01:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 21:01:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2022-01-31 21:01:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 89 states have internal predecessors, (123), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 130 transitions. [2022-01-31 21:01:20,745 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 130 transitions. Word has length 38 [2022-01-31 21:01:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:20,745 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 130 transitions. [2022-01-31 21:01:20,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 130 transitions. [2022-01-31 21:01:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:01:20,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:20,746 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:20,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 21:01:20,746 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2113862810, now seen corresponding path program 25 times [2022-01-31 21:01:20,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:20,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633110854] [2022-01-31 21:01:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:20,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:20,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:20,883 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:20,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:20,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:20,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:20,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:20,883 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:20,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:20,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:21,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:21,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633110854] [2022-01-31 21:01:21,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1633110854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:21,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:21,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:01:21,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195499173] [2022-01-31 21:01:21,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:21,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:01:21,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:01:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:01:21,256 INFO L87 Difference]: Start difference. First operand 95 states and 130 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:21,879 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2022-01-31 21:01:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:01:21,880 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 38 [2022-01-31 21:01:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:21,881 INFO L225 Difference]: With dead ends: 106 [2022-01-31 21:01:21,881 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 21:01:21,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=2943, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:01:21,883 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:21,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 105 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:21,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 21:01:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-01-31 21:01:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.4022988505747127) internal successors, (122), 89 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 129 transitions. [2022-01-31 21:01:21,901 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 129 transitions. Word has length 38 [2022-01-31 21:01:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:21,902 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 129 transitions. [2022-01-31 21:01:21,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 129 transitions. [2022-01-31 21:01:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:01:21,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:21,902 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:21,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 21:01:21,902 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:21,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash 13070114, now seen corresponding path program 26 times [2022-01-31 21:01:21,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:21,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453587255] [2022-01-31 21:01:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:21,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:22,024 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:22,024 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:22,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:22,025 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:22,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:22,025 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:22,025 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:22,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:22,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:22,469 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453587255] [2022-01-31 21:01:22,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453587255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:22,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:22,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:01:22,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500848126] [2022-01-31 21:01:22,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:22,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:01:22,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:01:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:01:22,471 INFO L87 Difference]: Start difference. First operand 95 states and 129 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:01:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:23,317 INFO L93 Difference]: Finished difference Result 146 states and 203 transitions. [2022-01-31 21:01:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:01:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 38 [2022-01-31 21:01:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:23,319 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:01:23,319 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 21:01:23,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=3634, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:01:23,320 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:23,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 114 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:01:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 21:01:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2022-01-31 21:01:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 111 states have (on average 1.4504504504504505) internal successors, (161), 113 states have internal predecessors, (161), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2022-01-31 21:01:23,339 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 38 [2022-01-31 21:01:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:23,339 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2022-01-31 21:01:23,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:01:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2022-01-31 21:01:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:01:23,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:23,340 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:23,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 21:01:23,340 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1788077476, now seen corresponding path program 27 times [2022-01-31 21:01:23,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:23,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952635567] [2022-01-31 21:01:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:23,383 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:23,467 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:23,468 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:23,468 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:23,468 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:23,468 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:23,468 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:23,468 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:23,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:23,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:23,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952635567] [2022-01-31 21:01:23,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [952635567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:23,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:23,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:01:23,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983784120] [2022-01-31 21:01:23,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:23,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:01:23,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:23,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:01:23,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:01:23,978 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 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 21:01:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:24,955 INFO L93 Difference]: Finished difference Result 137 states and 188 transitions. [2022-01-31 21:01:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:01:24,955 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 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 38 [2022-01-31 21:01:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:24,956 INFO L225 Difference]: With dead ends: 137 [2022-01-31 21:01:24,956 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 21:01:24,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=4128, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:01:24,958 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:24,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 133 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:01:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 21:01:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2022-01-31 21:01:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 113 states have (on average 1.4424778761061947) internal successors, (163), 115 states have internal predecessors, (163), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 170 transitions. [2022-01-31 21:01:24,975 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 170 transitions. Word has length 38 [2022-01-31 21:01:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:24,975 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 170 transitions. [2022-01-31 21:01:24,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 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 21:01:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 170 transitions. [2022-01-31 21:01:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 21:01:24,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:24,976 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:24,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 21:01:24,976 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:24,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1315975962, now seen corresponding path program 28 times [2022-01-31 21:01:24,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:24,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221682752] [2022-01-31 21:01:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:25,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:25,078 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:25,078 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:25,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:25,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:25,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:25,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:25,079 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:25,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:25,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:25,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:25,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221682752] [2022-01-31 21:01:25,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [221682752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:25,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:25,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:01:25,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910523139] [2022-01-31 21:01:25,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:25,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:01:25,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:01:25,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:01:25,405 INFO L87 Difference]: Start difference. First operand 121 states and 170 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:25,810 INFO L93 Difference]: Finished difference Result 128 states and 176 transitions. [2022-01-31 21:01:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:01:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 21:01:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:25,811 INFO L225 Difference]: With dead ends: 128 [2022-01-31 21:01:25,811 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 21:01:25,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:01:25,811 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:25,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 90 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:01:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 21:01:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 107. [2022-01-31 21:01:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.4545454545454546) internal successors, (144), 101 states have internal predecessors, (144), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2022-01-31 21:01:25,831 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 41 [2022-01-31 21:01:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:25,832 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2022-01-31 21:01:25,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2022-01-31 21:01:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 21:01:25,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:25,832 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:25,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 21:01:25,832 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash 648100574, now seen corresponding path program 29 times [2022-01-31 21:01:25,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:25,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628132824] [2022-01-31 21:01:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:25,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:25,914 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:25,914 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:25,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:25,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:25,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:25,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:25,915 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:25,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:25,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:25,965 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 21:01:26,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:26,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628132824] [2022-01-31 21:01:26,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [628132824] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:26,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:26,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:01:26,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144738617] [2022-01-31 21:01:26,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:26,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:01:26,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:01:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:01:26,265 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:26,754 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2022-01-31 21:01:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:01:26,754 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 21:01:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:26,755 INFO L225 Difference]: With dead ends: 116 [2022-01-31 21:01:26,755 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 21:01:26,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:01:26,756 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:26,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 92 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:01:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 21:01:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-01-31 21:01:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.4444444444444444) internal successors, (143), 101 states have internal predecessors, (143), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 150 transitions. [2022-01-31 21:01:26,774 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 150 transitions. Word has length 41 [2022-01-31 21:01:26,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:26,774 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 150 transitions. [2022-01-31 21:01:26,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 150 transitions. [2022-01-31 21:01:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 21:01:26,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:26,774 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:26,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 21:01:26,775 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash 213838234, now seen corresponding path program 30 times [2022-01-31 21:01:26,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:26,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132878752] [2022-01-31 21:01:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:26,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:26,880 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:26,880 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:26,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:26,881 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:26,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:26,881 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:26,881 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:26,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:26,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:26,938 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 21:01:27,333 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:27,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132878752] [2022-01-31 21:01:27,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1132878752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:27,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:27,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:01:27,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186864772] [2022-01-31 21:01:27,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:27,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:01:27,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:27,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:01:27,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:01:27,335 INFO L87 Difference]: Start difference. First operand 107 states and 150 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:27,947 INFO L93 Difference]: Finished difference Result 118 states and 160 transitions. [2022-01-31 21:01:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:01:27,947 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 41 [2022-01-31 21:01:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:27,948 INFO L225 Difference]: With dead ends: 118 [2022-01-31 21:01:27,948 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 21:01:27,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=2945, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:01:27,949 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:27,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 99 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 21:01:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2022-01-31 21:01:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.4343434343434343) internal successors, (142), 101 states have internal predecessors, (142), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 149 transitions. [2022-01-31 21:01:27,967 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 149 transitions. Word has length 41 [2022-01-31 21:01:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:27,967 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 149 transitions. [2022-01-31 21:01:27,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 149 transitions. [2022-01-31 21:01:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 21:01:27,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:27,968 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:27,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 21:01:27,968 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash 20059230, now seen corresponding path program 31 times [2022-01-31 21:01:27,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:27,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568013078] [2022-01-31 21:01:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:27,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:28,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:28,077 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:28,078 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:28,078 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:28,078 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:28,078 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:28,078 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:28,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:28,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:28,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:28,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568013078] [2022-01-31 21:01:28,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568013078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:28,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:28,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:01:28,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177851037] [2022-01-31 21:01:28,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:28,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:01:28,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:28,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:01:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:01:28,547 INFO L87 Difference]: Start difference. First operand 107 states and 149 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:01:29,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:29,256 INFO L93 Difference]: Finished difference Result 119 states and 160 transitions. [2022-01-31 21:01:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:01:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 41 [2022-01-31 21:01:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:29,258 INFO L225 Difference]: With dead ends: 119 [2022-01-31 21:01:29,258 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 21:01:29,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=3630, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:01:29,259 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:29,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 101 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 21:01:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-01-31 21:01:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.4242424242424243) internal successors, (141), 101 states have internal predecessors, (141), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 148 transitions. [2022-01-31 21:01:29,284 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 148 transitions. Word has length 41 [2022-01-31 21:01:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:29,284 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 148 transitions. [2022-01-31 21:01:29,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:01:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 148 transitions. [2022-01-31 21:01:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 21:01:29,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:29,285 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:29,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 21:01:29,285 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:29,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2146992154, now seen corresponding path program 32 times [2022-01-31 21:01:29,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:29,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904191482] [2022-01-31 21:01:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:29,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:29,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:29,401 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:29,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:29,402 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:29,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:29,402 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:29,402 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:29,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:29,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:29,446 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 21:01:29,873 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:29,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904191482] [2022-01-31 21:01:29,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904191482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:29,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:29,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:01:29,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348324015] [2022-01-31 21:01:29,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:29,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:01:29,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:29,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:01:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:01:29,874 INFO L87 Difference]: Start difference. First operand 107 states and 148 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:01:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:30,930 INFO L93 Difference]: Finished difference Result 164 states and 231 transitions. [2022-01-31 21:01:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:01:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 41 [2022-01-31 21:01:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:30,931 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:01:30,931 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 21:01:30,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=4391, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:01:30,932 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:30,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 131 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:01:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 21:01:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 134. [2022-01-31 21:01:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.4682539682539681) internal successors, (185), 128 states have internal predecessors, (185), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 192 transitions. [2022-01-31 21:01:30,959 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 192 transitions. Word has length 41 [2022-01-31 21:01:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:30,959 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 192 transitions. [2022-01-31 21:01:30,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:01:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 192 transitions. [2022-01-31 21:01:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 21:01:30,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:30,960 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:30,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 21:01:30,960 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash -372967780, now seen corresponding path program 33 times [2022-01-31 21:01:30,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:30,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974454029] [2022-01-31 21:01:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:30,990 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:31,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:31,063 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:31,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:31,063 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:31,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:31,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:31,064 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:31,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:31,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:31,606 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974454029] [2022-01-31 21:01:31,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974454029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:31,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:31,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:01:31,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908830932] [2022-01-31 21:01:31,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:31,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:01:31,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:31,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:01:31,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:01:31,608 INFO L87 Difference]: Start difference. First operand 134 states and 192 transitions. Second operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 35 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 21:01:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:32,610 INFO L93 Difference]: Finished difference Result 153 states and 213 transitions. [2022-01-31 21:01:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:01:32,615 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 21:01:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:32,616 INFO L225 Difference]: With dead ends: 153 [2022-01-31 21:01:32,616 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 21:01:32,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=319, Invalid=4937, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:01:32,618 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:32,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 134 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:01:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 21:01:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2022-01-31 21:01:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.4609375) internal successors, (187), 130 states have internal predecessors, (187), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2022-01-31 21:01:32,648 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 41 [2022-01-31 21:01:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:32,648 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2022-01-31 21:01:32,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 35 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 21:01:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2022-01-31 21:01:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:01:32,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:32,649 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:32,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 21:01:32,650 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:32,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1118445790, now seen corresponding path program 34 times [2022-01-31 21:01:32,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:32,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929688266] [2022-01-31 21:01:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:32,685 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:32,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:32,775 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:32,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:32,775 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:32,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:32,775 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:32,775 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:32,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:32,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:33,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:33,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929688266] [2022-01-31 21:01:33,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929688266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:33,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:33,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:01:33,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269371514] [2022-01-31 21:01:33,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:33,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:01:33,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:33,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:01:33,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:01:33,185 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:33,735 INFO L93 Difference]: Finished difference Result 144 states and 201 transitions. [2022-01-31 21:01:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:01:33,735 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:01:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:33,736 INFO L225 Difference]: With dead ends: 144 [2022-01-31 21:01:33,736 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 21:01:33,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:01:33,737 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:33,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 86 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:01:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 21:01:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-01-31 21:01:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.453125) internal successors, (186), 130 states have internal predecessors, (186), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 193 transitions. [2022-01-31 21:01:33,757 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 193 transitions. Word has length 44 [2022-01-31 21:01:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:33,757 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 193 transitions. [2022-01-31 21:01:33,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 193 transitions. [2022-01-31 21:01:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:01:33,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:33,758 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:33,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 21:01:33,758 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:33,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1786321178, now seen corresponding path program 35 times [2022-01-31 21:01:33,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:33,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953916993] [2022-01-31 21:01:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:33,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:33,854 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:33,855 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:33,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:33,855 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:33,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:33,855 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:33,856 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:33,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:33,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:34,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:34,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953916993] [2022-01-31 21:01:34,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1953916993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:34,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:34,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:01:34,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733424020] [2022-01-31 21:01:34,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:34,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:01:34,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:34,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:01:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:01:34,281 INFO L87 Difference]: Start difference. First operand 136 states and 193 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:34,891 INFO L93 Difference]: Finished difference Result 146 states and 202 transitions. [2022-01-31 21:01:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:01:34,891 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 44 [2022-01-31 21:01:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:34,892 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:01:34,892 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 21:01:34,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=2945, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:01:34,893 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:34,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 108 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 21:01:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2022-01-31 21:01:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.4453125) internal successors, (185), 130 states have internal predecessors, (185), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 192 transitions. [2022-01-31 21:01:34,914 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 192 transitions. Word has length 44 [2022-01-31 21:01:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:34,914 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 192 transitions. [2022-01-31 21:01:34,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 192 transitions. [2022-01-31 21:01:34,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:01:34,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:34,914 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:34,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 21:01:34,915 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:34,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:34,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2074383778, now seen corresponding path program 36 times [2022-01-31 21:01:34,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:34,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155906790] [2022-01-31 21:01:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:34,961 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:35,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:35,036 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:35,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:35,036 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:35,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:35,037 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:35,037 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:35,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:35,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:35,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155906790] [2022-01-31 21:01:35,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [155906790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:35,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:35,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:01:35,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378193375] [2022-01-31 21:01:35,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:35,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:01:35,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:01:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:01:35,470 INFO L87 Difference]: Start difference. First operand 136 states and 192 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:01:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:36,207 INFO L93 Difference]: Finished difference Result 148 states and 203 transitions. [2022-01-31 21:01:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:01:36,208 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 44 [2022-01-31 21:01:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:36,208 INFO L225 Difference]: With dead ends: 148 [2022-01-31 21:01:36,208 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 21:01:36,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:01:36,210 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:36,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 120 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:01:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 21:01:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2022-01-31 21:01:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.4375) internal successors, (184), 130 states have internal predecessors, (184), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 191 transitions. [2022-01-31 21:01:36,248 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 191 transitions. Word has length 44 [2022-01-31 21:01:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:36,248 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 191 transitions. [2022-01-31 21:01:36,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:01:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 191 transitions. [2022-01-31 21:01:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:01:36,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:36,249 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:36,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 21:01:36,249 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:36,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:36,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1880604774, now seen corresponding path program 37 times [2022-01-31 21:01:36,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:36,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163786997] [2022-01-31 21:01:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:36,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:36,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:36,368 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:36,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:36,368 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:36,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:36,368 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:36,368 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:36,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:36,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:36,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:36,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163786997] [2022-01-31 21:01:36,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [163786997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:36,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:36,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:01:36,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592440549] [2022-01-31 21:01:36,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:36,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:01:36,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:36,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:01:36,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:01:36,878 INFO L87 Difference]: Start difference. First operand 136 states and 191 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:01:37,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:37,743 INFO L93 Difference]: Finished difference Result 149 states and 203 transitions. [2022-01-31 21:01:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:01:37,743 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 44 [2022-01-31 21:01:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:37,744 INFO L225 Difference]: With dead ends: 149 [2022-01-31 21:01:37,744 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 21:01:37,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:01:37,745 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:37,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 132 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:01:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 21:01:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2022-01-31 21:01:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.4296875) internal successors, (183), 130 states have internal predecessors, (183), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2022-01-31 21:01:37,781 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 44 [2022-01-31 21:01:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:37,781 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2022-01-31 21:01:37,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:01:37,782 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2022-01-31 21:01:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:01:37,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:37,782 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:37,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 21:01:37,782 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash -287429598, now seen corresponding path program 38 times [2022-01-31 21:01:37,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:37,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871963404] [2022-01-31 21:01:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:37,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:37,890 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:37,891 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:37,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:37,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:37,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:37,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:37,891 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:37,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:37,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:38,442 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871963404] [2022-01-31 21:01:38,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1871963404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:38,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:38,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:01:38,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580035717] [2022-01-31 21:01:38,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:38,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:01:38,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:38,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:01:38,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:01:38,444 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:01:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:39,571 INFO L93 Difference]: Finished difference Result 199 states and 282 transitions. [2022-01-31 21:01:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:01:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 44 [2022-01-31 21:01:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:39,574 INFO L225 Difference]: With dead ends: 199 [2022-01-31 21:01:39,574 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:01:39,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=5222, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:01:39,575 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 54 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:39,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 133 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1859 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:01:39,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:01:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 166. [2022-01-31 21:01:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 158 states have (on average 1.4683544303797469) internal successors, (232), 160 states have internal predecessors, (232), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 239 transitions. [2022-01-31 21:01:39,602 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 239 transitions. Word has length 44 [2022-01-31 21:01:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:39,602 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 239 transitions. [2022-01-31 21:01:39,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:01:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 239 transitions. [2022-01-31 21:01:39,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:01:39,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:39,602 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:39,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 21:01:39,603 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:39,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:39,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1487577764, now seen corresponding path program 39 times [2022-01-31 21:01:39,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:39,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843179189] [2022-01-31 21:01:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:39,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:39,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:39,699 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:39,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:39,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:39,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:39,700 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:39,700 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:39,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:39,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:40,357 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:40,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843179189] [2022-01-31 21:01:40,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1843179189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:40,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:40,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 21:01:40,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206267314] [2022-01-31 21:01:40,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:40,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:01:40,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:01:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:01:40,360 INFO L87 Difference]: Start difference. First operand 166 states and 239 transitions. Second operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 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 21:01:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:41,501 INFO L93 Difference]: Finished difference Result 186 states and 261 transitions. [2022-01-31 21:01:41,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:01:41,502 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:01:41,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:41,503 INFO L225 Difference]: With dead ends: 186 [2022-01-31 21:01:41,503 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 21:01:41,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=5816, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:01:41,504 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:41,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 135 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:01:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 21:01:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2022-01-31 21:01:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 160 states have (on average 1.4625) internal successors, (234), 162 states have internal predecessors, (234), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2022-01-31 21:01:41,541 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 44 [2022-01-31 21:01:41,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:41,541 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2022-01-31 21:01:41,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 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 21:01:41,541 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2022-01-31 21:01:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:01:41,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:41,542 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:41,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 21:01:41,542 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2066897826, now seen corresponding path program 40 times [2022-01-31 21:01:41,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:41,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371845514] [2022-01-31 21:01:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:41,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:41,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:41,644 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:41,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:41,644 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:41,645 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:41,645 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:41,645 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:41,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:41,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:42,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:42,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371845514] [2022-01-31 21:01:42,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [371845514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:42,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:42,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:01:42,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491259154] [2022-01-31 21:01:42,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:42,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:01:42,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:01:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:01:42,070 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:42,595 INFO L93 Difference]: Finished difference Result 175 states and 247 transitions. [2022-01-31 21:01:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:01:42,595 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 21:01:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:42,596 INFO L225 Difference]: With dead ends: 175 [2022-01-31 21:01:42,596 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 21:01:42,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:01:42,597 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:42,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 90 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:01:42,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 21:01:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2022-01-31 21:01:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.4755244755244756) internal successors, (211), 145 states have internal predecessors, (211), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 218 transitions. [2022-01-31 21:01:42,621 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 218 transitions. Word has length 47 [2022-01-31 21:01:42,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:42,622 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 218 transitions. [2022-01-31 21:01:42,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 218 transitions. [2022-01-31 21:01:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:01:42,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:42,622 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:42,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 21:01:42,622 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:42,623 INFO L85 PathProgramCache]: Analyzing trace with hash -159099366, now seen corresponding path program 41 times [2022-01-31 21:01:42,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:42,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589763573] [2022-01-31 21:01:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:42,661 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:42,739 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:42,739 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:42,739 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:42,739 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:42,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:42,740 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:42,740 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:42,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:42,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:42,780 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 21:01:43,116 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:43,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589763573] [2022-01-31 21:01:43,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1589763573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:43,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:43,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:01:43,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104253149] [2022-01-31 21:01:43,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:43,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:01:43,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:43,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:01:43,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:01:43,117 INFO L87 Difference]: Start difference. First operand 151 states and 218 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:43,735 INFO L93 Difference]: Finished difference Result 160 states and 226 transitions. [2022-01-31 21:01:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:01:43,736 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 47 [2022-01-31 21:01:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:43,736 INFO L225 Difference]: With dead ends: 160 [2022-01-31 21:01:43,737 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 21:01:43,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=2943, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:01:43,738 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:43,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 107 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 21:01:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2022-01-31 21:01:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.4685314685314685) internal successors, (210), 145 states have internal predecessors, (210), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 217 transitions. [2022-01-31 21:01:43,771 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 217 transitions. Word has length 47 [2022-01-31 21:01:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:43,771 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 217 transitions. [2022-01-31 21:01:43,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 217 transitions. [2022-01-31 21:01:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:01:43,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:43,772 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:43,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 21:01:43,772 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:43,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash -826974754, now seen corresponding path program 42 times [2022-01-31 21:01:43,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:43,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180535844] [2022-01-31 21:01:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:43,802 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:43,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:43,860 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:43,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:43,860 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:43,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:43,860 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:43,860 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:43,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:43,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:44,310 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180535844] [2022-01-31 21:01:44,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180535844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:44,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:44,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:01:44,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031718480] [2022-01-31 21:01:44,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:44,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:01:44,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:44,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:01:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:01:44,311 INFO L87 Difference]: Start difference. First operand 151 states and 217 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:01:45,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:45,066 INFO L93 Difference]: Finished difference Result 162 states and 227 transitions. [2022-01-31 21:01:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:01:45,066 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 47 [2022-01-31 21:01:45,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:45,067 INFO L225 Difference]: With dead ends: 162 [2022-01-31 21:01:45,067 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 21:01:45,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:01:45,070 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:45,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 99 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 21:01:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-01-31 21:01:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.4615384615384615) internal successors, (209), 145 states have internal predecessors, (209), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 216 transitions. [2022-01-31 21:01:45,107 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 216 transitions. Word has length 47 [2022-01-31 21:01:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:45,107 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 216 transitions. [2022-01-31 21:01:45,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:01:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 216 transitions. [2022-01-31 21:01:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:01:45,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:45,108 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:45,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 21:01:45,108 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1261237094, now seen corresponding path program 43 times [2022-01-31 21:01:45,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:45,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145966422] [2022-01-31 21:01:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:45,164 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:45,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:45,254 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:45,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:45,254 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:45,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:45,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:45,255 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:45,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:45,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:45,769 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:45,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145966422] [2022-01-31 21:01:45,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2145966422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:45,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:45,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:01:45,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794160447] [2022-01-31 21:01:45,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:45,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:01:45,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:45,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:01:45,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:01:45,771 INFO L87 Difference]: Start difference. First operand 151 states and 216 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:01:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:46,781 INFO L93 Difference]: Finished difference Result 164 states and 228 transitions. [2022-01-31 21:01:46,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:01:46,782 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 47 [2022-01-31 21:01:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:46,783 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:01:46,783 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 21:01:46,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=4391, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:01:46,784 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:46,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 131 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:01:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 21:01:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2022-01-31 21:01:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.4545454545454546) internal successors, (208), 145 states have internal predecessors, (208), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 215 transitions. [2022-01-31 21:01:46,826 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 215 transitions. Word has length 47 [2022-01-31 21:01:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:46,826 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 215 transitions. [2022-01-31 21:01:46,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:01:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 215 transitions. [2022-01-31 21:01:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:01:46,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:46,826 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:46,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 21:01:46,827 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1455016098, now seen corresponding path program 44 times [2022-01-31 21:01:46,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:46,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894252948] [2022-01-31 21:01:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:46,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:46,967 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:46,968 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:46,968 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:46,968 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:46,968 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:46,968 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:46,968 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:46,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:47,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:47,593 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:47,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894252948] [2022-01-31 21:01:47,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [894252948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:47,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:47,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:01:47,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885892891] [2022-01-31 21:01:47,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:47,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:01:47,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:47,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:01:47,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:01:47,594 INFO L87 Difference]: Start difference. First operand 151 states and 215 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:01:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:48,690 INFO L93 Difference]: Finished difference Result 165 states and 228 transitions. [2022-01-31 21:01:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:01:48,691 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 47 [2022-01-31 21:01:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:48,691 INFO L225 Difference]: With dead ends: 165 [2022-01-31 21:01:48,692 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:01:48,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=328, Invalid=5222, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:01:48,693 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:48,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 153 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:01:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:01:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2022-01-31 21:01:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.4475524475524475) internal successors, (207), 145 states have internal predecessors, (207), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 214 transitions. [2022-01-31 21:01:48,736 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 214 transitions. Word has length 47 [2022-01-31 21:01:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:48,737 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 214 transitions. [2022-01-31 21:01:48,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:01:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 214 transitions. [2022-01-31 21:01:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:01:48,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:48,737 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:48,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 21:01:48,738 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:48,738 INFO L85 PathProgramCache]: Analyzing trace with hash 671916826, now seen corresponding path program 45 times [2022-01-31 21:01:48,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:48,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842885481] [2022-01-31 21:01:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:48,767 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:48,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:48,825 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:48,826 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:48,826 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:48,826 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:48,826 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:48,826 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:48,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:48,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:49,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:49,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842885481] [2022-01-31 21:01:49,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [842885481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:49,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:49,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:01:49,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016587150] [2022-01-31 21:01:49,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:49,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:01:49,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:49,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:01:49,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:01:49,462 INFO L87 Difference]: Start difference. First operand 151 states and 214 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:01:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:51,058 INFO L93 Difference]: Finished difference Result 220 states and 315 transitions. [2022-01-31 21:01:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:01:51,059 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 47 [2022-01-31 21:01:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:51,060 INFO L225 Difference]: With dead ends: 220 [2022-01-31 21:01:51,060 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 21:01:51,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=6127, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:01:51,061 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3075 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:51,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 190 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3075 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:01:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 21:01:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2022-01-31 21:01:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 178 states have internal predecessors, (261), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 268 transitions. [2022-01-31 21:01:51,103 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 268 transitions. Word has length 47 [2022-01-31 21:01:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:51,103 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 268 transitions. [2022-01-31 21:01:51,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:01:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 268 transitions. [2022-01-31 21:01:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:01:51,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:51,104 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:51,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 21:01:51,104 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:51,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1848043108, now seen corresponding path program 46 times [2022-01-31 21:01:51,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:51,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316916457] [2022-01-31 21:01:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:51,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:51,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:51,208 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:51,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:51,208 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:51,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:51,208 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:51,208 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:51,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:51,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:51,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316916457] [2022-01-31 21:01:51,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [316916457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:51,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:51,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 21:01:51,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295629002] [2022-01-31 21:01:51,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:51,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 21:01:51,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 21:01:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1765, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 21:01:51,849 INFO L87 Difference]: Start difference. First operand 184 states and 268 transitions. Second operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 41 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 21:01:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:53,221 INFO L93 Difference]: Finished difference Result 205 states and 291 transitions. [2022-01-31 21:01:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 21:01:53,222 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 21:01:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:53,222 INFO L225 Difference]: With dead ends: 205 [2022-01-31 21:01:53,222 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 21:01:53,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=6765, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 21:01:53,224 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:53,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 171 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2430 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:01:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 21:01:53,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 186. [2022-01-31 21:01:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.4775280898876404) internal successors, (263), 180 states have internal predecessors, (263), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2022-01-31 21:01:53,256 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 47 [2022-01-31 21:01:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:53,256 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2022-01-31 21:01:53,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 41 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 21:01:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2022-01-31 21:01:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:01:53,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:53,256 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:53,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 21:01:53,257 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:53,257 INFO L85 PathProgramCache]: Analyzing trace with hash -889968026, now seen corresponding path program 47 times [2022-01-31 21:01:53,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:53,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998186651] [2022-01-31 21:01:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:53,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:53,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:53,344 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:53,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:53,344 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:53,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:53,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:53,345 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:53,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:53,737 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:53,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998186651] [2022-01-31 21:01:53,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [998186651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:53,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:53,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:01:53,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270546606] [2022-01-31 21:01:53,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:53,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:01:53,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:01:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:01:53,738 INFO L87 Difference]: Start difference. First operand 186 states and 270 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:54,342 INFO L93 Difference]: Finished difference Result 194 states and 277 transitions. [2022-01-31 21:01:54,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:01:54,342 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 50 [2022-01-31 21:01:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:54,348 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:01:54,348 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 21:01:54,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=2945, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:01:54,349 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:54,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 106 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:01:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 21:01:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-01-31 21:01:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.4719101123595506) internal successors, (262), 180 states have internal predecessors, (262), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 269 transitions. [2022-01-31 21:01:54,393 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 269 transitions. Word has length 50 [2022-01-31 21:01:54,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:54,394 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 269 transitions. [2022-01-31 21:01:54,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:01:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 269 transitions. [2022-01-31 21:01:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:01:54,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:54,394 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:54,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 21:01:54,395 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:54,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1017830434, now seen corresponding path program 48 times [2022-01-31 21:01:54,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:54,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223282027] [2022-01-31 21:01:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:54,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:54,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:54,541 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:54,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:54,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:54,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:54,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:54,542 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:54,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:54,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:54,596 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 21:01:55,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:55,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223282027] [2022-01-31 21:01:55,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [223282027] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:55,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:55,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:01:55,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297278883] [2022-01-31 21:01:55,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:55,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:01:55,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:55,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:01:55,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:01:55,122 INFO L87 Difference]: Start difference. First operand 186 states and 269 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:01:55,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:55,929 INFO L93 Difference]: Finished difference Result 196 states and 278 transitions. [2022-01-31 21:01:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:01:55,930 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 50 [2022-01-31 21:01:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:55,931 INFO L225 Difference]: With dead ends: 196 [2022-01-31 21:01:55,931 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 21:01:55,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:01:55,933 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:55,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 113 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:01:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 21:01:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2022-01-31 21:01:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.4662921348314606) internal successors, (261), 180 states have internal predecessors, (261), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2022-01-31 21:01:55,977 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 50 [2022-01-31 21:01:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:55,978 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2022-01-31 21:01:55,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:01:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2022-01-31 21:01:55,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:01:55,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:55,978 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:55,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 21:01:55,979 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:55,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash 349955046, now seen corresponding path program 49 times [2022-01-31 21:01:55,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:55,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125912286] [2022-01-31 21:01:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:56,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:56,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:56,066 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:56,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:56,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:56,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:56,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:56,067 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:56,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:56,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:56,567 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:56,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125912286] [2022-01-31 21:01:56,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125912286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:56,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:56,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:01:56,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295351308] [2022-01-31 21:01:56,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:56,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:01:56,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:56,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:01:56,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:01:56,568 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:01:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:57,417 INFO L93 Difference]: Finished difference Result 198 states and 279 transitions. [2022-01-31 21:01:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:01:57,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 50 [2022-01-31 21:01:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:57,418 INFO L225 Difference]: With dead ends: 198 [2022-01-31 21:01:57,419 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 21:01:57,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:01:57,420 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:57,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 120 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:01:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 21:01:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 186. [2022-01-31 21:01:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.4606741573033708) internal successors, (260), 180 states have internal predecessors, (260), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 267 transitions. [2022-01-31 21:01:57,463 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 267 transitions. Word has length 50 [2022-01-31 21:01:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:57,463 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 267 transitions. [2022-01-31 21:01:57,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:01:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 267 transitions. [2022-01-31 21:01:57,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:01:57,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:57,463 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:57,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 21:01:57,464 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash -84307294, now seen corresponding path program 50 times [2022-01-31 21:01:57,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:57,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457559032] [2022-01-31 21:01:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:57,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:57,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:57,576 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:57,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:57,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:57,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:57,577 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:57,577 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:57,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:57,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:58,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:58,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457559032] [2022-01-31 21:01:58,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1457559032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:58,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:58,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:01:58,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347685959] [2022-01-31 21:01:58,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:58,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:01:58,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:01:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:01:58,155 INFO L87 Difference]: Start difference. First operand 186 states and 267 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:01:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:59,191 INFO L93 Difference]: Finished difference Result 200 states and 280 transitions. [2022-01-31 21:01:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:01:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 50 [2022-01-31 21:01:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:59,192 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:01:59,192 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 21:01:59,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:01:59,193 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:59,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 142 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:01:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 21:01:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2022-01-31 21:01:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.4550561797752808) internal successors, (259), 180 states have internal predecessors, (259), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:01:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 266 transitions. [2022-01-31 21:01:59,226 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 266 transitions. Word has length 50 [2022-01-31 21:01:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:59,226 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 266 transitions. [2022-01-31 21:01:59,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:01:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 266 transitions. [2022-01-31 21:01:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:01:59,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:59,227 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:59,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 21:01:59,227 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash -278086298, now seen corresponding path program 51 times [2022-01-31 21:01:59,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:59,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085466547] [2022-01-31 21:01:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:59,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:59,327 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:59,328 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:59,328 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:59,328 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:59,328 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:59,328 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:01:59,328 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:01:59,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:59,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:59,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:59,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085466547] [2022-01-31 21:01:59,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1085466547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:59,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:59,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:01:59,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574419782] [2022-01-31 21:01:59,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:59,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:01:59,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:01:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:01:59,926 INFO L87 Difference]: Start difference. First operand 186 states and 266 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:02:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:01,138 INFO L93 Difference]: Finished difference Result 201 states and 280 transitions. [2022-01-31 21:02:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:02:01,139 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 50 [2022-01-31 21:02:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:01,140 INFO L225 Difference]: With dead ends: 201 [2022-01-31 21:02:01,140 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:02:01,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:02:01,141 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:01,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 159 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:02:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:02:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2022-01-31 21:02:01,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.449438202247191) internal successors, (258), 180 states have internal predecessors, (258), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 265 transitions. [2022-01-31 21:02:01,188 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 265 transitions. Word has length 50 [2022-01-31 21:02:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:01,188 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 265 transitions. [2022-01-31 21:02:01,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:02:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 265 transitions. [2022-01-31 21:02:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:02:01,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:01,189 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:01,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 21:02:01,189 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:01,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1848846626, now seen corresponding path program 52 times [2022-01-31 21:02:01,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:01,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058782356] [2022-01-31 21:02:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:01,220 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:01,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:01,280 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:01,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:01,280 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:01,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:01,280 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:01,280 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:01,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:01,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:01,965 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:01,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058782356] [2022-01-31 21:02:01,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2058782356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:01,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:01,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:02:01,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113645059] [2022-01-31 21:02:01,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:01,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:02:01,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:01,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:02:01,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:02:01,966 INFO L87 Difference]: Start difference. First operand 186 states and 265 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:02:03,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:03,353 INFO L93 Difference]: Finished difference Result 261 states and 375 transitions. [2022-01-31 21:02:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:02:03,354 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 50 [2022-01-31 21:02:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:03,355 INFO L225 Difference]: With dead ends: 261 [2022-01-31 21:02:03,355 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:02:03,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:02:03,356 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 61 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:03,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 142 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:02:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:02:03,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 222. [2022-01-31 21:02:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 214 states have (on average 1.4813084112149533) internal successors, (317), 216 states have internal predecessors, (317), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 324 transitions. [2022-01-31 21:02:03,420 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 324 transitions. Word has length 50 [2022-01-31 21:02:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:03,420 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 324 transitions. [2022-01-31 21:02:03,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:02:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 324 transitions. [2022-01-31 21:02:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:02:03,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:03,421 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:03,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 21:02:03,421 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:03,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:03,421 INFO L85 PathProgramCache]: Analyzing trace with hash -671113308, now seen corresponding path program 53 times [2022-01-31 21:02:03,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:03,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913596505] [2022-01-31 21:02:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:03,463 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:03,535 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:03,535 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:03,536 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:03,536 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:03,536 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:03,536 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:03,536 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:03,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:03,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:04,251 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:04,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913596505] [2022-01-31 21:02:04,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1913596505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:04,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:04,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 21:02:04,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139927466] [2022-01-31 21:02:04,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:04,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 21:02:04,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 21:02:04,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2026, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:02:04,253 INFO L87 Difference]: Start difference. First operand 222 states and 324 transitions. Second operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 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 21:02:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:05,608 INFO L93 Difference]: Finished difference Result 244 states and 348 transitions. [2022-01-31 21:02:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 21:02:05,608 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:02:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:05,609 INFO L225 Difference]: With dead ends: 244 [2022-01-31 21:02:05,609 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:02:05,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=402, Invalid=7788, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 21:02:05,610 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2175 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:05,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 147 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2175 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:02:05,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:02:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 224. [2022-01-31 21:02:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 216 states have (on average 1.4768518518518519) internal successors, (319), 218 states have internal predecessors, (319), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 326 transitions. [2022-01-31 21:02:05,676 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 326 transitions. Word has length 50 [2022-01-31 21:02:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:05,677 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 326 transitions. [2022-01-31 21:02:05,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 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 21:02:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 326 transitions. [2022-01-31 21:02:05,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:02:05,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:05,677 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:05,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 21:02:05,678 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1285972634, now seen corresponding path program 54 times [2022-01-31 21:02:05,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:05,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16304571] [2022-01-31 21:02:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:05,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:05,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:05,787 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:05,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:05,787 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:05,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:05,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:05,788 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:05,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:05,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:06,210 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:06,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16304571] [2022-01-31 21:02:06,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [16304571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:06,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:06,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:02:06,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351445159] [2022-01-31 21:02:06,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:06,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:02:06,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:06,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:02:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:02:06,212 INFO L87 Difference]: Start difference. First operand 224 states and 326 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:02:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:06,906 INFO L93 Difference]: Finished difference Result 231 states and 332 transitions. [2022-01-31 21:02:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:02:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 53 [2022-01-31 21:02:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:06,907 INFO L225 Difference]: With dead ends: 231 [2022-01-31 21:02:06,907 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:02:06,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=2943, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:02:06,908 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:06,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 105 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:02:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:02:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 204. [2022-01-31 21:02:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.489795918367347) internal successors, (292), 198 states have internal predecessors, (292), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 299 transitions. [2022-01-31 21:02:06,946 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 299 transitions. Word has length 53 [2022-01-31 21:02:06,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:06,946 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 299 transitions. [2022-01-31 21:02:06,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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 21:02:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 299 transitions. [2022-01-31 21:02:06,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:02:06,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:06,947 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:06,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 21:02:06,947 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:06,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1207666526, now seen corresponding path program 55 times [2022-01-31 21:02:06,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:06,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524323627] [2022-01-31 21:02:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:06,984 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:07,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:07,053 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:07,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:07,053 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:07,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:07,053 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:07,054 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:07,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:07,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:07,602 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:07,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524323627] [2022-01-31 21:02:07,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [524323627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:07,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:07,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:02:07,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273537768] [2022-01-31 21:02:07,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:07,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:02:07,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:07,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:02:07,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:02:07,604 INFO L87 Difference]: Start difference. First operand 204 states and 299 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:02:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:08,309 INFO L93 Difference]: Finished difference Result 213 states and 307 transitions. [2022-01-31 21:02:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:02:08,310 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 53 [2022-01-31 21:02:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:08,311 INFO L225 Difference]: With dead ends: 213 [2022-01-31 21:02:08,311 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:02:08,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:02:08,312 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:08,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 107 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:02:08,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:02:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2022-01-31 21:02:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 198 states have internal predecessors, (291), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 298 transitions. [2022-01-31 21:02:08,349 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 298 transitions. Word has length 53 [2022-01-31 21:02:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:08,349 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 298 transitions. [2022-01-31 21:02:08,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:02:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 298 transitions. [2022-01-31 21:02:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:02:08,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:08,350 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:08,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 21:02:08,350 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:08,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:08,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1179502310, now seen corresponding path program 56 times [2022-01-31 21:02:08,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:08,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681328090] [2022-01-31 21:02:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:08,388 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:08,484 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:08,485 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:08,485 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:08,485 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:08,485 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:08,485 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:08,485 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:08,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:08,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:08,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:08,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681328090] [2022-01-31 21:02:08,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [681328090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:08,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:08,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:02:08,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232608936] [2022-01-31 21:02:08,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:08,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:02:08,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:02:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:02:08,997 INFO L87 Difference]: Start difference. First operand 204 states and 298 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:02:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:09,954 INFO L93 Difference]: Finished difference Result 215 states and 308 transitions. [2022-01-31 21:02:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:02:09,954 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 53 [2022-01-31 21:02:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:09,956 INFO L225 Difference]: With dead ends: 215 [2022-01-31 21:02:09,956 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 21:02:09,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:02:09,957 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:09,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 139 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:02:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 21:02:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2022-01-31 21:02:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.4795918367346939) internal successors, (290), 198 states have internal predecessors, (290), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 297 transitions. [2022-01-31 21:02:10,017 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 297 transitions. Word has length 53 [2022-01-31 21:02:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:10,017 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 297 transitions. [2022-01-31 21:02:10,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:02:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 297 transitions. [2022-01-31 21:02:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:02:10,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:10,018 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:10,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 21:02:10,018 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:10,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1847377698, now seen corresponding path program 57 times [2022-01-31 21:02:10,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:10,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679323287] [2022-01-31 21:02:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:10,050 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:10,135 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:10,136 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:10,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:10,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:10,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:10,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:10,136 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:10,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:10,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:10,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:10,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679323287] [2022-01-31 21:02:10,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1679323287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:10,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:10,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:02:10,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658532076] [2022-01-31 21:02:10,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:10,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:02:10,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:02:10,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:02:10,843 INFO L87 Difference]: Start difference. First operand 204 states and 297 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:02:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:11,820 INFO L93 Difference]: Finished difference Result 217 states and 309 transitions. [2022-01-31 21:02:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:02:11,821 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 53 [2022-01-31 21:02:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:11,821 INFO L225 Difference]: With dead ends: 217 [2022-01-31 21:02:11,822 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 21:02:11,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=328, Invalid=5222, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:02:11,823 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:11,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 126 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:02:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 21:02:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-01-31 21:02:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.4744897959183674) internal successors, (289), 198 states have internal predecessors, (289), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 296 transitions. [2022-01-31 21:02:11,879 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 296 transitions. Word has length 53 [2022-01-31 21:02:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:11,879 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 296 transitions. [2022-01-31 21:02:11,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:02:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 296 transitions. [2022-01-31 21:02:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:02:11,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:11,880 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:11,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 21:02:11,880 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2013327258, now seen corresponding path program 58 times [2022-01-31 21:02:11,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:11,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802979380] [2022-01-31 21:02:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:11,910 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:11,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:11,980 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:11,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:11,981 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:11,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:11,981 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:11,981 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:11,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:12,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:12,028 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 21:02:12,670 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802979380] [2022-01-31 21:02:12,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [802979380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:12,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:12,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:02:12,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171585412] [2022-01-31 21:02:12,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:12,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:02:12,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:12,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:02:12,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:02:12,672 INFO L87 Difference]: Start difference. First operand 204 states and 296 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:02:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:14,151 INFO L93 Difference]: Finished difference Result 219 states and 310 transitions. [2022-01-31 21:02:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:02:14,152 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 53 [2022-01-31 21:02:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:14,153 INFO L225 Difference]: With dead ends: 219 [2022-01-31 21:02:14,153 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:02:14,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:02:14,154 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:14,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 153 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:02:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:02:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2022-01-31 21:02:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.469387755102041) internal successors, (288), 198 states have internal predecessors, (288), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2022-01-31 21:02:14,199 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 53 [2022-01-31 21:02:14,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:14,199 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2022-01-31 21:02:14,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:02:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2022-01-31 21:02:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:02:14,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:14,199 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:14,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 21:02:14,200 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:14,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1819548254, now seen corresponding path program 59 times [2022-01-31 21:02:14,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:14,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858867207] [2022-01-31 21:02:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:14,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:14,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:14,315 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:14,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:14,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:14,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:14,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:14,316 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:14,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:14,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:15,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:15,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858867207] [2022-01-31 21:02:15,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1858867207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:15,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:15,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:02:15,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883669593] [2022-01-31 21:02:15,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:15,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:02:15,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:02:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:02:15,157 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:02:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:16,740 INFO L93 Difference]: Finished difference Result 220 states and 310 transitions. [2022-01-31 21:02:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:02:16,740 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 53 [2022-01-31 21:02:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:16,741 INFO L225 Difference]: With dead ends: 220 [2022-01-31 21:02:16,741 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 21:02:16,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2591 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:02:16,742 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:16,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 165 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:02:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 21:02:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 204. [2022-01-31 21:02:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.4642857142857142) internal successors, (287), 198 states have internal predecessors, (287), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2022-01-31 21:02:16,780 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 53 [2022-01-31 21:02:16,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:16,780 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2022-01-31 21:02:16,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:02:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2022-01-31 21:02:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:02:16,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:16,780 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:16,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 21:02:16,781 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:16,781 INFO L85 PathProgramCache]: Analyzing trace with hash -348486118, now seen corresponding path program 60 times [2022-01-31 21:02:16,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:16,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554828853] [2022-01-31 21:02:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:16,822 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:16,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:16,873 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:16,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:16,873 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:16,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:16,873 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:16,873 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:16,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:16,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:17,686 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:17,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554828853] [2022-01-31 21:02:17,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [554828853] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:17,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:17,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:02:17,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242282075] [2022-01-31 21:02:17,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:17,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:02:17,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:02:17,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:02:17,688 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:02:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:19,434 INFO L93 Difference]: Finished difference Result 285 states and 413 transitions. [2022-01-31 21:02:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:02:19,434 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 53 [2022-01-31 21:02:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:19,436 INFO L225 Difference]: With dead ends: 285 [2022-01-31 21:02:19,436 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 21:02:19,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=8147, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:02:19,437 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3247 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 3374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:19,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 179 Invalid, 3374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3247 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:02:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 21:02:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 243. [2022-01-31 21:02:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 235 states have (on average 1.4936170212765958) internal successors, (351), 237 states have internal predecessors, (351), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-01-31 21:02:19,490 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 53 [2022-01-31 21:02:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:19,490 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-01-31 21:02:19,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:02:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-01-31 21:02:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:02:19,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:19,491 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:19,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 21:02:19,491 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:19,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:19,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1426521244, now seen corresponding path program 61 times [2022-01-31 21:02:19,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:19,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239188206] [2022-01-31 21:02:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:19,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:19,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:19,594 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:19,595 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:19,595 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:19,595 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:19,595 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:19,595 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:19,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:19,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:20,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:20,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239188206] [2022-01-31 21:02:20,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239188206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:20,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:20,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 21:02:20,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251787224] [2022-01-31 21:02:20,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:20,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 21:02:20,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 21:02:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 21:02:20,448 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 47 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 21:02:22,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:22,181 INFO L93 Difference]: Finished difference Result 266 states and 383 transitions. [2022-01-31 21:02:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 21:02:22,182 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 21:02:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:22,183 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:02:22,183 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 21:02:22,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=429, Invalid=8883, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 21:02:22,184 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:22,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 178 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2882 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:02:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 21:02:22,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 245. [2022-01-31 21:02:22,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.489451476793249) internal successors, (353), 239 states have internal predecessors, (353), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 360 transitions. [2022-01-31 21:02:22,237 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 360 transitions. Word has length 53 [2022-01-31 21:02:22,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:22,237 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 360 transitions. [2022-01-31 21:02:22,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 47 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 21:02:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 360 transitions. [2022-01-31 21:02:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:02:22,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:22,238 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:22,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 21:02:22,238 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:22,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash 142754466, now seen corresponding path program 62 times [2022-01-31 21:02:22,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:22,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186256547] [2022-01-31 21:02:22,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:22,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:22,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:22,365 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:22,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:22,365 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:22,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:22,366 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:22,366 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:22,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:22,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:22,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186256547] [2022-01-31 21:02:22,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186256547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:22,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:22,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:02:22,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901615902] [2022-01-31 21:02:22,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:22,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:02:22,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:22,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:02:22,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:02:22,836 INFO L87 Difference]: Start difference. First operand 245 states and 360 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:02:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:23,531 INFO L93 Difference]: Finished difference Result 253 states and 367 transitions. [2022-01-31 21:02:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:02:23,532 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 56 [2022-01-31 21:02:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:23,533 INFO L225 Difference]: With dead ends: 253 [2022-01-31 21:02:23,533 INFO L226 Difference]: Without dead ends: 246 [2022-01-31 21:02:23,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=3630, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:02:23,534 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:23,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 106 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:02:23,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-31 21:02:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2022-01-31 21:02:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.4852320675105486) internal successors, (352), 239 states have internal predecessors, (352), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 359 transitions. [2022-01-31 21:02:23,607 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 359 transitions. Word has length 56 [2022-01-31 21:02:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:23,608 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 359 transitions. [2022-01-31 21:02:23,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:02:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 359 transitions. [2022-01-31 21:02:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:02:23,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:23,608 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:23,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 21:02:23,609 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash 64448358, now seen corresponding path program 63 times [2022-01-31 21:02:23,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:23,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284829727] [2022-01-31 21:02:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:23,641 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:23,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:23,707 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:23,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:23,708 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:23,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:23,708 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:23,708 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:23,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:23,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:24,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:24,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284829727] [2022-01-31 21:02:24,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284829727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:24,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:24,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:02:24,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209450359] [2022-01-31 21:02:24,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:24,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:02:24,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:24,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:02:24,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:02:24,278 INFO L87 Difference]: Start difference. First operand 245 states and 359 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:02:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:25,113 INFO L93 Difference]: Finished difference Result 255 states and 368 transitions. [2022-01-31 21:02:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:02:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 56 [2022-01-31 21:02:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:25,115 INFO L225 Difference]: With dead ends: 255 [2022-01-31 21:02:25,115 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:02:25,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:02:25,115 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:25,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 123 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:02:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:02:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 245. [2022-01-31 21:02:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.481012658227848) internal successors, (351), 239 states have internal predecessors, (351), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 358 transitions. [2022-01-31 21:02:25,164 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 358 transitions. Word has length 56 [2022-01-31 21:02:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:25,164 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 358 transitions. [2022-01-31 21:02:25,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:02:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 358 transitions. [2022-01-31 21:02:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:02:25,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:25,165 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:25,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 21:02:25,165 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:25,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1972246818, now seen corresponding path program 64 times [2022-01-31 21:02:25,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:25,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749076345] [2022-01-31 21:02:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:25,201 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:25,277 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:25,278 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:25,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:25,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:25,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:25,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:25,281 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:25,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:25,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:25,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:25,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749076345] [2022-01-31 21:02:25,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [749076345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:25,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:25,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:02:25,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290569736] [2022-01-31 21:02:25,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:25,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:02:25,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:25,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:02:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:02:25,917 INFO L87 Difference]: Start difference. First operand 245 states and 358 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:02:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:26,874 INFO L93 Difference]: Finished difference Result 257 states and 369 transitions. [2022-01-31 21:02:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:02:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 56 [2022-01-31 21:02:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:26,875 INFO L225 Difference]: With dead ends: 257 [2022-01-31 21:02:26,875 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 21:02:26,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=328, Invalid=5222, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:02:26,876 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:26,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 125 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:02:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 21:02:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2022-01-31 21:02:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.4767932489451476) internal successors, (350), 239 states have internal predecessors, (350), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 357 transitions. [2022-01-31 21:02:26,928 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 357 transitions. Word has length 56 [2022-01-31 21:02:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:26,928 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 357 transitions. [2022-01-31 21:02:26,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:02:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 357 transitions. [2022-01-31 21:02:26,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:02:26,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:26,929 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:26,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 21:02:26,929 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:26,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:26,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1304371430, now seen corresponding path program 65 times [2022-01-31 21:02:26,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:26,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363016049] [2022-01-31 21:02:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:26,967 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:27,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:27,036 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:27,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:27,036 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:27,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:27,036 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:27,036 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:27,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:27,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:27,730 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:27,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363016049] [2022-01-31 21:02:27,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363016049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:27,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:27,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:02:27,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502226562] [2022-01-31 21:02:27,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:27,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:02:27,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:02:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:02:27,732 INFO L87 Difference]: Start difference. First operand 245 states and 357 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:02:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:28,943 INFO L93 Difference]: Finished difference Result 259 states and 370 transitions. [2022-01-31 21:02:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:02:28,943 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 56 [2022-01-31 21:02:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:28,944 INFO L225 Difference]: With dead ends: 259 [2022-01-31 21:02:28,944 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 21:02:28,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=355, Invalid=6125, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:02:28,945 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:28,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 132 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:02:28,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 21:02:29,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2022-01-31 21:02:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.4725738396624473) internal successors, (349), 239 states have internal predecessors, (349), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 356 transitions. [2022-01-31 21:02:29,008 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 356 transitions. Word has length 56 [2022-01-31 21:02:29,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:29,008 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 356 transitions. [2022-01-31 21:02:29,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:02:29,008 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 356 transitions. [2022-01-31 21:02:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:02:29,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:29,009 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:29,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 21:02:29,009 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:29,009 INFO L85 PathProgramCache]: Analyzing trace with hash 870109090, now seen corresponding path program 66 times [2022-01-31 21:02:29,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:29,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945660024] [2022-01-31 21:02:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:29,047 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:29,121 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:29,122 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:29,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:29,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:29,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:29,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:29,122 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:29,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:29,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:29,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:29,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945660024] [2022-01-31 21:02:29,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [945660024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:29,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:29,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:02:29,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707128714] [2022-01-31 21:02:29,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:29,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:02:29,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:29,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:02:29,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:02:29,849 INFO L87 Difference]: Start difference. First operand 245 states and 356 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:02:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:31,310 INFO L93 Difference]: Finished difference Result 261 states and 371 transitions. [2022-01-31 21:02:31,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:02:31,310 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 56 [2022-01-31 21:02:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:31,336 INFO L225 Difference]: With dead ends: 261 [2022-01-31 21:02:31,336 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:02:31,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2549 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:02:31,338 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:31,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 144 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:02:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:02:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2022-01-31 21:02:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.4683544303797469) internal successors, (348), 239 states have internal predecessors, (348), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 355 transitions. [2022-01-31 21:02:31,472 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 355 transitions. Word has length 56 [2022-01-31 21:02:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:31,472 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 355 transitions. [2022-01-31 21:02:31,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:02:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 355 transitions. [2022-01-31 21:02:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:02:31,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:31,473 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:31,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 21:02:31,473 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:31,473 INFO L85 PathProgramCache]: Analyzing trace with hash 676330086, now seen corresponding path program 67 times [2022-01-31 21:02:31,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:31,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719094356] [2022-01-31 21:02:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:31,557 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:31,653 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:31,654 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:31,654 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:31,654 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:31,654 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:31,654 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:31,654 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:31,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:31,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:32,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:32,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719094356] [2022-01-31 21:02:32,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [719094356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:32,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:32,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:02:32,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761533825] [2022-01-31 21:02:32,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:32,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:02:32,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:32,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:02:32,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:02:32,480 INFO L87 Difference]: Start difference. First operand 245 states and 355 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:02:34,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:34,296 INFO L93 Difference]: Finished difference Result 262 states and 371 transitions. [2022-01-31 21:02:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:02:34,296 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 56 [2022-01-31 21:02:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:34,298 INFO L225 Difference]: With dead ends: 262 [2022-01-31 21:02:34,298 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 21:02:34,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:02:34,299 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2933 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:34,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 191 Invalid, 3020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2933 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:02:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 21:02:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 245. [2022-01-31 21:02:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.4641350210970465) internal successors, (347), 239 states have internal predecessors, (347), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 354 transitions. [2022-01-31 21:02:34,371 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 354 transitions. Word has length 56 [2022-01-31 21:02:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:34,371 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 354 transitions. [2022-01-31 21:02:34,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:02:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 354 transitions. [2022-01-31 21:02:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:02:34,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:34,372 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:34,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 21:02:34,372 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:34,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1491704286, now seen corresponding path program 68 times [2022-01-31 21:02:34,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:34,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201573025] [2022-01-31 21:02:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:34,421 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:34,489 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:34,489 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:34,489 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:34,489 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:34,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:34,490 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:34,490 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:34,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:34,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:35,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:35,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201573025] [2022-01-31 21:02:35,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1201573025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:35,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:35,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:02:35,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523096210] [2022-01-31 21:02:35,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:35,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:02:35,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:35,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:02:35,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:02:35,414 INFO L87 Difference]: Start difference. First operand 245 states and 354 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:02:37,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:37,241 INFO L93 Difference]: Finished difference Result 332 states and 482 transitions. [2022-01-31 21:02:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:02:37,241 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 56 [2022-01-31 21:02:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:37,242 INFO L225 Difference]: With dead ends: 332 [2022-01-31 21:02:37,242 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 21:02:37,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3440 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:02:37,243 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3251 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 3388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 3251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:37,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 171 Invalid, 3388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 3251 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:02:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 21:02:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 287. [2022-01-31 21:02:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 279 states have (on average 1.4910394265232976) internal successors, (416), 281 states have internal predecessors, (416), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 423 transitions. [2022-01-31 21:02:37,306 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 423 transitions. Word has length 56 [2022-01-31 21:02:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:37,306 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 423 transitions. [2022-01-31 21:02:37,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:02:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 423 transitions. [2022-01-31 21:02:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:02:37,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:37,332 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:37,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 21:02:37,332 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash 283303076, now seen corresponding path program 69 times [2022-01-31 21:02:37,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:37,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795183551] [2022-01-31 21:02:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:37,409 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:37,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:37,512 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:37,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:37,513 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:37,513 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:37,513 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:37,513 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:37,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:37,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:37,558 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 21:02:38,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:38,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795183551] [2022-01-31 21:02:38,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [795183551] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:38,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:38,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 21:02:38,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217444409] [2022-01-31 21:02:38,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:38,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 21:02:38,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 21:02:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:02:38,389 INFO L87 Difference]: Start difference. First operand 287 states and 423 transitions. Second operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 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 21:02:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:40,544 INFO L93 Difference]: Finished difference Result 311 states and 449 transitions. [2022-01-31 21:02:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 21:02:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:02:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:40,545 INFO L225 Difference]: With dead ends: 311 [2022-01-31 21:02:40,545 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 21:02:40,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3800 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=456, Invalid=10050, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 21:02:40,546 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 75 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3176 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:40,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 184 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3176 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:02:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 21:02:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 289. [2022-01-31 21:02:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 281 states have (on average 1.4875444839857652) internal successors, (418), 283 states have internal predecessors, (418), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 425 transitions. [2022-01-31 21:02:40,609 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 425 transitions. Word has length 56 [2022-01-31 21:02:40,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:40,610 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 425 transitions. [2022-01-31 21:02:40,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 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 21:02:40,610 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 425 transitions. [2022-01-31 21:02:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:02:40,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:40,610 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:40,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 21:02:40,610 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:40,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:40,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2023976738, now seen corresponding path program 70 times [2022-01-31 21:02:40,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:40,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034648226] [2022-01-31 21:02:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:40,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:40,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:40,726 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:40,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:40,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:40,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:40,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:40,726 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:40,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:40,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:41,263 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:41,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034648226] [2022-01-31 21:02:41,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034648226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:41,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:41,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:02:41,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143346679] [2022-01-31 21:02:41,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:41,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:02:41,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:41,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:02:41,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:02:41,264 INFO L87 Difference]: Start difference. First operand 289 states and 425 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:02:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:42,013 INFO L93 Difference]: Finished difference Result 296 states and 431 transitions. [2022-01-31 21:02:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:02:42,013 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 59 [2022-01-31 21:02:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:42,014 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:02:42,014 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 21:02:42,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:02:42,014 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:42,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 120 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:02:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 21:02:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 266. [2022-01-31 21:02:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.5) internal successors, (387), 260 states have internal predecessors, (387), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 394 transitions. [2022-01-31 21:02:42,075 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 394 transitions. Word has length 59 [2022-01-31 21:02:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:42,076 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 394 transitions. [2022-01-31 21:02:42,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 21:02:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 394 transitions. [2022-01-31 21:02:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:02:42,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:42,076 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:42,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 21:02:42,077 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1620968858, now seen corresponding path program 71 times [2022-01-31 21:02:42,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:42,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770807916] [2022-01-31 21:02:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:42,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:42,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:42,184 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:42,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:42,184 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:42,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:42,184 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:42,185 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:42,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:42,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:42,235 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 21:02:42,854 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:42,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770807916] [2022-01-31 21:02:42,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770807916] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:42,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:42,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:02:42,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344617056] [2022-01-31 21:02:42,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:42,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:02:42,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:42,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:02:42,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:02:42,855 INFO L87 Difference]: Start difference. First operand 266 states and 394 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:02:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:43,866 INFO L93 Difference]: Finished difference Result 275 states and 402 transitions. [2022-01-31 21:02:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:02:43,866 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 59 [2022-01-31 21:02:43,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:43,867 INFO L225 Difference]: With dead ends: 275 [2022-01-31 21:02:43,867 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 21:02:43,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:02:43,867 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:43,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 142 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:02:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 21:02:43,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2022-01-31 21:02:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.496124031007752) internal successors, (386), 260 states have internal predecessors, (386), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 393 transitions. [2022-01-31 21:02:43,921 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 393 transitions. Word has length 59 [2022-01-31 21:02:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:43,921 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 393 transitions. [2022-01-31 21:02:43,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:02:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 393 transitions. [2022-01-31 21:02:43,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:02:43,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:43,921 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:43,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 21:02:43,921 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:43,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:43,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1542662750, now seen corresponding path program 72 times [2022-01-31 21:02:43,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:43,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190686229] [2022-01-31 21:02:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:43,958 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:44,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:44,027 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:44,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:44,027 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:44,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:44,027 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:44,027 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:44,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:44,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:44,619 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:44,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190686229] [2022-01-31 21:02:44,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190686229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:44,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:44,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:02:44,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307562072] [2022-01-31 21:02:44,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:44,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:02:44,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:44,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:02:44,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:02:44,621 INFO L87 Difference]: Start difference. First operand 266 states and 393 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:02:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:45,596 INFO L93 Difference]: Finished difference Result 277 states and 403 transitions. [2022-01-31 21:02:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:02:45,596 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 59 [2022-01-31 21:02:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:45,597 INFO L225 Difference]: With dead ends: 277 [2022-01-31 21:02:45,597 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 21:02:45,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:02:45,598 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:45,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 139 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:02:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 21:02:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2022-01-31 21:02:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.4922480620155039) internal successors, (385), 260 states have internal predecessors, (385), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 392 transitions. [2022-01-31 21:02:45,656 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 392 transitions. Word has length 59 [2022-01-31 21:02:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:45,656 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 392 transitions. [2022-01-31 21:02:45,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:02:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 392 transitions. [2022-01-31 21:02:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:02:45,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:45,656 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:45,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 21:02:45,657 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash -844506086, now seen corresponding path program 73 times [2022-01-31 21:02:45,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:45,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111465846] [2022-01-31 21:02:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:45,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:45,744 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:45,744 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:45,744 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:45,744 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:45,744 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:45,744 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:45,744 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:45,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:45,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:46,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:46,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111465846] [2022-01-31 21:02:46,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111465846] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:46,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:46,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:02:46,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922288063] [2022-01-31 21:02:46,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:46,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:02:46,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:46,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:02:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:02:46,382 INFO L87 Difference]: Start difference. First operand 266 states and 392 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:02:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:47,599 INFO L93 Difference]: Finished difference Result 279 states and 404 transitions. [2022-01-31 21:02:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:02:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 59 [2022-01-31 21:02:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:47,600 INFO L225 Difference]: With dead ends: 279 [2022-01-31 21:02:47,600 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:02:47,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:02:47,601 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:47,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 166 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:02:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:02:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 266. [2022-01-31 21:02:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.4883720930232558) internal successors, (384), 260 states have internal predecessors, (384), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 391 transitions. [2022-01-31 21:02:47,655 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 391 transitions. Word has length 59 [2022-01-31 21:02:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:47,655 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 391 transitions. [2022-01-31 21:02:47,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:02:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 391 transitions. [2022-01-31 21:02:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:02:47,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:47,655 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:47,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 21:02:47,655 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1512381474, now seen corresponding path program 74 times [2022-01-31 21:02:47,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:47,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607783941] [2022-01-31 21:02:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:47,683 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:47,739 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:47,739 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:47,739 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:47,739 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:47,739 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:47,739 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:47,740 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:47,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:47,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:48,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:48,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607783941] [2022-01-31 21:02:48,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607783941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:48,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:48,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:02:48,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477262179] [2022-01-31 21:02:48,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:48,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:02:48,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:48,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:02:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:02:48,540 INFO L87 Difference]: Start difference. First operand 266 states and 391 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:02:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:49,814 INFO L93 Difference]: Finished difference Result 281 states and 405 transitions. [2022-01-31 21:02:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:02:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 59 [2022-01-31 21:02:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:49,815 INFO L225 Difference]: With dead ends: 281 [2022-01-31 21:02:49,815 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 21:02:49,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:02:49,816 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:49,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 153 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:02:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 21:02:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 266. [2022-01-31 21:02:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.4844961240310077) internal successors, (383), 260 states have internal predecessors, (383), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 390 transitions. [2022-01-31 21:02:49,869 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 390 transitions. Word has length 59 [2022-01-31 21:02:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:49,869 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 390 transitions. [2022-01-31 21:02:49,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:02:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 390 transitions. [2022-01-31 21:02:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:02:49,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:49,870 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:49,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 21:02:49,870 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:49,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1946643814, now seen corresponding path program 75 times [2022-01-31 21:02:49,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:49,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591002218] [2022-01-31 21:02:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:49,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:49,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:49,949 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:49,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:49,949 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:49,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:49,949 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:49,949 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:49,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:49,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:50,666 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:50,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591002218] [2022-01-31 21:02:50,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [591002218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:50,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:50,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:02:50,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259257273] [2022-01-31 21:02:50,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:50,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:02:50,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:50,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:02:50,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:02:50,667 INFO L87 Difference]: Start difference. First operand 266 states and 390 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:02:52,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:52,197 INFO L93 Difference]: Finished difference Result 283 states and 406 transitions. [2022-01-31 21:02:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:02:52,197 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 59 [2022-01-31 21:02:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:52,198 INFO L225 Difference]: With dead ends: 283 [2022-01-31 21:02:52,198 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 21:02:52,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2995 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:02:52,199 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:52,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 180 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:02:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 21:02:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 266. [2022-01-31 21:02:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.4806201550387597) internal successors, (382), 260 states have internal predecessors, (382), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 389 transitions. [2022-01-31 21:02:52,256 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 389 transitions. Word has length 59 [2022-01-31 21:02:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:52,256 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 389 transitions. [2022-01-31 21:02:52,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:02:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 389 transitions. [2022-01-31 21:02:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:02:52,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:52,256 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:52,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 21:02:52,257 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2140422818, now seen corresponding path program 76 times [2022-01-31 21:02:52,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:52,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736458381] [2022-01-31 21:02:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:52,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:52,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:52,380 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:52,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:52,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:52,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:52,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:52,381 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:52,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:52,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:53,198 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:53,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736458381] [2022-01-31 21:02:53,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736458381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:53,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:53,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:02:53,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729803032] [2022-01-31 21:02:53,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:53,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:02:53,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:02:53,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:02:53,200 INFO L87 Difference]: Start difference. First operand 266 states and 389 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:02:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:54,797 INFO L93 Difference]: Finished difference Result 284 states and 406 transitions. [2022-01-31 21:02:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:02:54,797 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 59 [2022-01-31 21:02:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:54,798 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:02:54,798 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 21:02:54,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3439 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:02:54,799 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2770 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:54,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 172 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2770 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:02:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 21:02:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 266. [2022-01-31 21:02:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.4767441860465116) internal successors, (381), 260 states have internal predecessors, (381), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 388 transitions. [2022-01-31 21:02:54,852 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 388 transitions. Word has length 59 [2022-01-31 21:02:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:54,852 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 388 transitions. [2022-01-31 21:02:54,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:02:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 388 transitions. [2022-01-31 21:02:54,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:02:54,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:54,853 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:54,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 21:02:54,853 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash -13489894, now seen corresponding path program 77 times [2022-01-31 21:02:54,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:54,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945677470] [2022-01-31 21:02:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:54,884 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:54,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:54,952 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:54,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:54,952 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:54,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:54,953 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:54,953 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:54,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:55,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:55,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:55,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945677470] [2022-01-31 21:02:55,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945677470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:55,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:55,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:02:55,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273503058] [2022-01-31 21:02:55,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:55,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:02:55,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:55,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:02:55,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:02:55,842 INFO L87 Difference]: Start difference. First operand 266 states and 388 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:02:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:58,146 INFO L93 Difference]: Finished difference Result 359 states and 525 transitions. [2022-01-31 21:02:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:02:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 59 [2022-01-31 21:02:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:58,148 INFO L225 Difference]: With dead ends: 359 [2022-01-31 21:02:58,148 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 21:02:58,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3909 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:02:58,149 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 61 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4742 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 4742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:58,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 223 Invalid, 4887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 4742 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:02:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 21:02:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 311. [2022-01-31 21:02:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 303 states have (on average 1.5016501650165017) internal successors, (455), 305 states have internal predecessors, (455), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:02:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 462 transitions. [2022-01-31 21:02:58,218 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 462 transitions. Word has length 59 [2022-01-31 21:02:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:58,219 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 462 transitions. [2022-01-31 21:02:58,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:02:58,219 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 462 transitions. [2022-01-31 21:02:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:02:58,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:58,219 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:58,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 21:02:58,219 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:58,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1761517468, now seen corresponding path program 78 times [2022-01-31 21:02:58,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:58,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803777529] [2022-01-31 21:02:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:58,247 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:58,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:58,316 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:58,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:58,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:58,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:58,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:02:58,316 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:02:58,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:58,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:59,250 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:59,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803777529] [2022-01-31 21:02:59,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [803777529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:59,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:59,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:02:59,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191787764] [2022-01-31 21:02:59,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:59,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:02:59,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:02:59,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 21:02:59,252 INFO L87 Difference]: Start difference. First operand 311 states and 462 transitions. Second operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 53 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 21:03:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:01,237 INFO L93 Difference]: Finished difference Result 336 states and 489 transitions. [2022-01-31 21:03:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 21:03:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 21:03:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:01,238 INFO L225 Difference]: With dead ends: 336 [2022-01-31 21:03:01,238 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 21:03:01,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4205 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=481, Invalid=11291, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 21:03:01,239 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3574 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 3687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:01,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 195 Invalid, 3687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3574 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:03:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 21:03:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 313. [2022-01-31 21:03:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.498360655737705) internal successors, (457), 307 states have internal predecessors, (457), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 464 transitions. [2022-01-31 21:03:01,304 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 464 transitions. Word has length 59 [2022-01-31 21:03:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:01,304 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 464 transitions. [2022-01-31 21:03:01,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 53 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 21:03:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 464 transitions. [2022-01-31 21:03:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:03:01,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:01,305 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:01,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 21:03:01,305 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:01,305 INFO L85 PathProgramCache]: Analyzing trace with hash -838710554, now seen corresponding path program 79 times [2022-01-31 21:03:01,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:01,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639755593] [2022-01-31 21:03:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:01,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:01,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:01,402 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:01,403 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:01,403 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:01,403 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:01,403 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:01,403 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:01,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:01,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:01,441 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 21:03:01,903 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:01,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639755593] [2022-01-31 21:03:01,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639755593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:01,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:01,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:03:01,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367532524] [2022-01-31 21:03:01,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:01,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:03:01,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:01,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:03:01,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:03:01,904 INFO L87 Difference]: Start difference. First operand 313 states and 464 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:03:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:02,728 INFO L93 Difference]: Finished difference Result 321 states and 471 transitions. [2022-01-31 21:03:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:03:02,728 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 62 [2022-01-31 21:03:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:02,729 INFO L225 Difference]: With dead ends: 321 [2022-01-31 21:03:02,729 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:03:02,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=4391, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:03:02,730 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:02,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 116 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:03:02,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:03:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2022-01-31 21:03:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.4950819672131148) internal successors, (456), 307 states have internal predecessors, (456), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 463 transitions. [2022-01-31 21:03:02,798 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 463 transitions. Word has length 62 [2022-01-31 21:03:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:02,798 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 463 transitions. [2022-01-31 21:03:02,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:03:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 463 transitions. [2022-01-31 21:03:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:03:02,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:02,799 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:02,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 21:03:02,799 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:02,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:02,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1488732254, now seen corresponding path program 80 times [2022-01-31 21:03:02,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:02,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968717896] [2022-01-31 21:03:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:02,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:02,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:02,897 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:02,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:02,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:02,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:02,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:02,897 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:02,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:02,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:03,453 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968717896] [2022-01-31 21:03:03,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [968717896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:03,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:03,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:03:03,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969242923] [2022-01-31 21:03:03,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:03,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:03:03,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:03,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:03:03,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:03:03,454 INFO L87 Difference]: Start difference. First operand 313 states and 463 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:03:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:04,448 INFO L93 Difference]: Finished difference Result 323 states and 472 transitions. [2022-01-31 21:03:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:03:04,448 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 62 [2022-01-31 21:03:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:04,449 INFO L225 Difference]: With dead ends: 323 [2022-01-31 21:03:04,449 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 21:03:04,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:03:04,450 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:04,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 128 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:03:04,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 21:03:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 313. [2022-01-31 21:03:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.4918032786885247) internal successors, (455), 307 states have internal predecessors, (455), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 462 transitions. [2022-01-31 21:03:04,547 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 462 transitions. Word has length 62 [2022-01-31 21:03:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:04,547 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 462 transitions. [2022-01-31 21:03:04,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:03:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 462 transitions. [2022-01-31 21:03:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:03:04,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:04,548 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:04,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 21:03:04,548 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1567038362, now seen corresponding path program 81 times [2022-01-31 21:03:04,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:04,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726927367] [2022-01-31 21:03:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:04,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:04,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:04,638 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:04,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:04,638 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:04,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:04,638 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:04,638 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:04,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:04,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:05,285 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:05,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726927367] [2022-01-31 21:03:05,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1726927367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:05,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:05,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:03:05,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288699938] [2022-01-31 21:03:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:05,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:03:05,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:03:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:03:05,287 INFO L87 Difference]: Start difference. First operand 313 states and 462 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:03:06,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:06,392 INFO L93 Difference]: Finished difference Result 325 states and 473 transitions. [2022-01-31 21:03:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:03:06,392 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 62 [2022-01-31 21:03:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:06,393 INFO L225 Difference]: With dead ends: 325 [2022-01-31 21:03:06,393 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 21:03:06,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=355, Invalid=6125, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:03:06,393 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:06,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 140 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:03:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 21:03:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 313. [2022-01-31 21:03:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.4885245901639343) internal successors, (454), 307 states have internal predecessors, (454), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 461 transitions. [2022-01-31 21:03:06,457 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 461 transitions. Word has length 62 [2022-01-31 21:03:06,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:06,457 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 461 transitions. [2022-01-31 21:03:06,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:03:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 461 transitions. [2022-01-31 21:03:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:03:06,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:06,458 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:06,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 21:03:06,458 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash 340760098, now seen corresponding path program 82 times [2022-01-31 21:03:06,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:06,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427097774] [2022-01-31 21:03:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:06,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:06,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:06,554 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:06,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:06,554 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:06,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:06,554 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:06,554 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:06,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:06,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:07,254 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:07,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427097774] [2022-01-31 21:03:07,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [427097774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:07,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:07,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:03:07,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387124946] [2022-01-31 21:03:07,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:07,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:03:07,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:07,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:03:07,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:03:07,256 INFO L87 Difference]: Start difference. First operand 313 states and 461 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:03:08,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:08,540 INFO L93 Difference]: Finished difference Result 327 states and 474 transitions. [2022-01-31 21:03:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:03:08,541 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 62 [2022-01-31 21:03:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:08,542 INFO L225 Difference]: With dead ends: 327 [2022-01-31 21:03:08,542 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:03:08,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:03:08,543 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:08,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 157 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:03:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:03:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 313. [2022-01-31 21:03:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.4852459016393442) internal successors, (453), 307 states have internal predecessors, (453), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 460 transitions. [2022-01-31 21:03:08,617 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 460 transitions. Word has length 62 [2022-01-31 21:03:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:08,617 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 460 transitions. [2022-01-31 21:03:08,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:03:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 460 transitions. [2022-01-31 21:03:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:03:08,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:08,618 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:08,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 21:03:08,618 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:08,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -327115290, now seen corresponding path program 83 times [2022-01-31 21:03:08,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:08,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119487266] [2022-01-31 21:03:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:08,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:08,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:08,717 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:08,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:08,717 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:08,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:08,717 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:08,717 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:08,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:08,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:09,491 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:09,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119487266] [2022-01-31 21:03:09,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119487266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:09,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:09,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:03:09,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467862199] [2022-01-31 21:03:09,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:09,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:03:09,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:09,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:03:09,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:03:09,493 INFO L87 Difference]: Start difference. First operand 313 states and 460 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:03:10,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:10,960 INFO L93 Difference]: Finished difference Result 329 states and 475 transitions. [2022-01-31 21:03:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:03:10,961 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 62 [2022-01-31 21:03:10,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:10,962 INFO L225 Difference]: With dead ends: 329 [2022-01-31 21:03:10,962 INFO L226 Difference]: Without dead ends: 322 [2022-01-31 21:03:10,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=8147, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:03:10,962 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:10,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 169 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:03:10,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-31 21:03:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 313. [2022-01-31 21:03:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.481967213114754) internal successors, (452), 307 states have internal predecessors, (452), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 459 transitions. [2022-01-31 21:03:11,033 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 459 transitions. Word has length 62 [2022-01-31 21:03:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:11,034 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 459 transitions. [2022-01-31 21:03:11,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:03:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 459 transitions. [2022-01-31 21:03:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:03:11,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:11,034 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:11,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 21:03:11,035 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:11,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:11,035 INFO L85 PathProgramCache]: Analyzing trace with hash -761377630, now seen corresponding path program 84 times [2022-01-31 21:03:11,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:11,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166589514] [2022-01-31 21:03:11,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:11,078 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:11,160 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:11,161 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:11,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:11,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:11,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:11,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:11,161 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:11,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:11,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:12,139 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:12,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166589514] [2022-01-31 21:03:12,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1166589514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:12,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:12,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:03:12,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114779592] [2022-01-31 21:03:12,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:12,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:03:12,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:03:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:03:12,142 INFO L87 Difference]: Start difference. First operand 313 states and 459 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:03:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:13,843 INFO L93 Difference]: Finished difference Result 331 states and 476 transitions. [2022-01-31 21:03:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:03:13,844 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 62 [2022-01-31 21:03:13,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:13,844 INFO L225 Difference]: With dead ends: 331 [2022-01-31 21:03:13,845 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 21:03:13,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3462 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:03:13,845 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2892 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:13,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 181 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2892 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:03:13,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 21:03:13,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 313. [2022-01-31 21:03:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.478688524590164) internal successors, (451), 307 states have internal predecessors, (451), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 458 transitions. [2022-01-31 21:03:13,909 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 458 transitions. Word has length 62 [2022-01-31 21:03:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:13,910 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 458 transitions. [2022-01-31 21:03:13,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:03:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 458 transitions. [2022-01-31 21:03:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:03:13,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:13,910 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:13,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 21:03:13,910 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:13,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:13,910 INFO L85 PathProgramCache]: Analyzing trace with hash -955156634, now seen corresponding path program 85 times [2022-01-31 21:03:13,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:13,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313110037] [2022-01-31 21:03:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:13,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:14,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:14,041 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:14,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:14,041 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:14,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:14,041 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:14,041 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:14,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:14,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:14,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:14,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313110037] [2022-01-31 21:03:14,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [313110037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:14,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:14,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:03:14,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419337944] [2022-01-31 21:03:14,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:14,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:03:14,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:14,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:03:14,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:03:14,997 INFO L87 Difference]: Start difference. First operand 313 states and 458 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:03:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:16,807 INFO L93 Difference]: Finished difference Result 332 states and 476 transitions. [2022-01-31 21:03:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:03:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 62 [2022-01-31 21:03:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:16,808 INFO L225 Difference]: With dead ends: 332 [2022-01-31 21:03:16,808 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 21:03:16,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:03:16,809 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:16,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 183 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:03:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 21:03:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 313. [2022-01-31 21:03:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.4754098360655739) internal successors, (450), 307 states have internal predecessors, (450), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 457 transitions. [2022-01-31 21:03:16,878 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 457 transitions. Word has length 62 [2022-01-31 21:03:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:16,878 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 457 transitions. [2022-01-31 21:03:16,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:03:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 457 transitions. [2022-01-31 21:03:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:03:16,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:16,878 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:16,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 21:03:16,879 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:16,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:16,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1171776290, now seen corresponding path program 86 times [2022-01-31 21:03:16,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:16,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254768364] [2022-01-31 21:03:16,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:16,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:16,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:16,969 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:16,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:16,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:16,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:16,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:16,970 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:16,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:17,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:18,011 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:18,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254768364] [2022-01-31 21:03:18,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254768364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:18,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:18,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:03:18,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901906759] [2022-01-31 21:03:18,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:18,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:03:18,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:03:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:03:18,013 INFO L87 Difference]: Start difference. First operand 313 states and 457 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:03:20,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:20,222 INFO L93 Difference]: Finished difference Result 412 states and 603 transitions. [2022-01-31 21:03:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:03:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 62 [2022-01-31 21:03:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:20,224 INFO L225 Difference]: With dead ends: 412 [2022-01-31 21:03:20,224 INFO L226 Difference]: Without dead ends: 389 [2022-01-31 21:03:20,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=11720, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:03:20,225 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4081 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 4235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:20,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 190 Invalid, 4235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4081 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:03:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-31 21:03:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 361. [2022-01-31 21:03:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 353 states have (on average 1.498583569405099) internal successors, (529), 355 states have internal predecessors, (529), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 536 transitions. [2022-01-31 21:03:20,304 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 536 transitions. Word has length 62 [2022-01-31 21:03:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:20,304 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 536 transitions. [2022-01-31 21:03:20,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:03:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 536 transitions. [2022-01-31 21:03:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:03:20,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:20,304 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:20,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 21:03:20,304 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:20,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1348183644, now seen corresponding path program 87 times [2022-01-31 21:03:20,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:20,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201918403] [2022-01-31 21:03:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:20,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:20,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:20,400 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:20,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:20,400 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:20,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:20,401 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:20,401 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:20,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:20,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:20,443 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 21:03:21,399 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:21,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201918403] [2022-01-31 21:03:21,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [201918403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:21,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:21,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 21:03:21,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114677917] [2022-01-31 21:03:21,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:21,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 21:03:21,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:21,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 21:03:21,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=3250, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:03:21,401 INFO L87 Difference]: Start difference. First operand 361 states and 536 transitions. Second operand has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 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 21:03:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:23,747 INFO L93 Difference]: Finished difference Result 387 states and 564 transitions. [2022-01-31 21:03:23,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 21:03:23,748 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:03:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:23,749 INFO L225 Difference]: With dead ends: 387 [2022-01-31 21:03:23,749 INFO L226 Difference]: Without dead ends: 379 [2022-01-31 21:03:23,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=510, Invalid=12600, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 21:03:23,749 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4550 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 4670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 4550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:23,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 231 Invalid, 4670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 4550 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:03:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-31 21:03:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 363. [2022-01-31 21:03:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 355 states have (on average 1.495774647887324) internal successors, (531), 357 states have internal predecessors, (531), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 538 transitions. [2022-01-31 21:03:23,827 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 538 transitions. Word has length 62 [2022-01-31 21:03:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:23,827 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 538 transitions. [2022-01-31 21:03:23,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 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 21:03:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 538 transitions. [2022-01-31 21:03:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:03:23,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:23,828 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:23,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 21:03:23,828 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:23,828 INFO L85 PathProgramCache]: Analyzing trace with hash -711036390, now seen corresponding path program 88 times [2022-01-31 21:03:23,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:23,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239917646] [2022-01-31 21:03:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:23,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:23,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:23,909 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:23,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:23,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:23,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:23,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:23,909 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:23,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:23,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:24,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239917646] [2022-01-31 21:03:24,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [239917646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:24,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:24,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:03:24,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87880164] [2022-01-31 21:03:24,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:24,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:03:24,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:24,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:03:24,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:03:24,496 INFO L87 Difference]: Start difference. First operand 363 states and 538 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:03:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:25,311 INFO L93 Difference]: Finished difference Result 370 states and 544 transitions. [2022-01-31 21:03:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:03:25,311 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 65 [2022-01-31 21:03:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:25,312 INFO L225 Difference]: With dead ends: 370 [2022-01-31 21:03:25,312 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 21:03:25,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:03:25,313 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:25,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 125 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:03:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 21:03:25,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 337. [2022-01-31 21:03:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.5075987841945289) internal successors, (496), 331 states have internal predecessors, (496), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 503 transitions. [2022-01-31 21:03:25,391 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 503 transitions. Word has length 65 [2022-01-31 21:03:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:25,392 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 503 transitions. [2022-01-31 21:03:25,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 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 21:03:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 503 transitions. [2022-01-31 21:03:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:03:25,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:25,392 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:25,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 21:03:25,392 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash 500036574, now seen corresponding path program 89 times [2022-01-31 21:03:25,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:25,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628094189] [2022-01-31 21:03:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:25,420 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:25,471 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:25,471 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:25,471 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:25,471 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:25,471 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:25,471 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:25,471 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:25,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:25,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:26,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:26,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628094189] [2022-01-31 21:03:26,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628094189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:26,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:26,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:03:26,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891521317] [2022-01-31 21:03:26,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:26,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:03:26,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:26,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:03:26,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:03:26,084 INFO L87 Difference]: Start difference. First operand 337 states and 503 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:03:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:27,082 INFO L93 Difference]: Finished difference Result 346 states and 511 transitions. [2022-01-31 21:03:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:03:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 65 [2022-01-31 21:03:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:27,083 INFO L225 Difference]: With dead ends: 346 [2022-01-31 21:03:27,083 INFO L226 Difference]: Without dead ends: 339 [2022-01-31 21:03:27,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:03:27,083 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:27,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 147 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:03:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-31 21:03:27,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2022-01-31 21:03:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.5045592705167172) internal successors, (495), 331 states have internal predecessors, (495), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:27,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 502 transitions. [2022-01-31 21:03:27,162 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 502 transitions. Word has length 65 [2022-01-31 21:03:27,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:27,162 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 502 transitions. [2022-01-31 21:03:27,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:03:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 502 transitions. [2022-01-31 21:03:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:03:27,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:27,162 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:27,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 21:03:27,163 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:27,163 INFO L85 PathProgramCache]: Analyzing trace with hash -149985126, now seen corresponding path program 90 times [2022-01-31 21:03:27,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:27,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348861980] [2022-01-31 21:03:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:27,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:27,241 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:27,241 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:27,241 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:27,241 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:27,241 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:27,241 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:27,241 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:27,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:27,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:27,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:27,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348861980] [2022-01-31 21:03:27,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [348861980] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:27,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:27,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:03:27,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991664818] [2022-01-31 21:03:27,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:27,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:03:27,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:27,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:03:27,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:03:27,973 INFO L87 Difference]: Start difference. First operand 337 states and 502 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:03:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:29,111 INFO L93 Difference]: Finished difference Result 348 states and 512 transitions. [2022-01-31 21:03:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:03:29,112 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 65 [2022-01-31 21:03:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:29,113 INFO L225 Difference]: With dead ends: 348 [2022-01-31 21:03:29,113 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 21:03:29,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:03:29,113 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:29,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 154 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:03:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 21:03:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 337. [2022-01-31 21:03:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.5015197568389058) internal successors, (494), 331 states have internal predecessors, (494), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 501 transitions. [2022-01-31 21:03:29,187 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 501 transitions. Word has length 65 [2022-01-31 21:03:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:29,187 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 501 transitions. [2022-01-31 21:03:29,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:03:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 501 transitions. [2022-01-31 21:03:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:03:29,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:29,188 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:29,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 21:03:29,188 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash -228291234, now seen corresponding path program 91 times [2022-01-31 21:03:29,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:29,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547501531] [2022-01-31 21:03:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:29,222 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:29,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:29,281 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:29,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:29,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:29,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:29,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:29,281 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:29,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:29,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:29,987 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547501531] [2022-01-31 21:03:29,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [547501531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:29,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:29,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:03:29,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439378438] [2022-01-31 21:03:29,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:29,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:03:29,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:29,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:03:29,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:03:29,988 INFO L87 Difference]: Start difference. First operand 337 states and 501 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:03:31,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:31,295 INFO L93 Difference]: Finished difference Result 350 states and 513 transitions. [2022-01-31 21:03:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:03:31,295 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 65 [2022-01-31 21:03:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:31,296 INFO L225 Difference]: With dead ends: 350 [2022-01-31 21:03:31,296 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 21:03:31,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2671 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:03:31,297 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:31,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 166 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:03:31,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 21:03:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 337. [2022-01-31 21:03:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.4984802431610942) internal successors, (493), 331 states have internal predecessors, (493), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 500 transitions. [2022-01-31 21:03:31,384 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 500 transitions. Word has length 65 [2022-01-31 21:03:31,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:31,384 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 500 transitions. [2022-01-31 21:03:31,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:03:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 500 transitions. [2022-01-31 21:03:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:03:31,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:31,385 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:31,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 21:03:31,385 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:31,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:31,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1679507226, now seen corresponding path program 92 times [2022-01-31 21:03:31,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:31,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234723805] [2022-01-31 21:03:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:31,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:31,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:31,486 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:31,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:31,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:31,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:31,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:31,487 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:31,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:31,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:32,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:32,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234723805] [2022-01-31 21:03:32,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234723805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:32,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:32,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:03:32,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086182963] [2022-01-31 21:03:32,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:32,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:03:32,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:32,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:03:32,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:03:32,412 INFO L87 Difference]: Start difference. First operand 337 states and 500 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:03:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:33,954 INFO L93 Difference]: Finished difference Result 352 states and 514 transitions. [2022-01-31 21:03:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:03:33,954 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 65 [2022-01-31 21:03:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:33,955 INFO L225 Difference]: With dead ends: 352 [2022-01-31 21:03:33,955 INFO L226 Difference]: Without dead ends: 345 [2022-01-31 21:03:33,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:03:33,956 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2651 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:33,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 183 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2651 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:03:33,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-31 21:03:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 337. [2022-01-31 21:03:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.4954407294832828) internal successors, (492), 331 states have internal predecessors, (492), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 499 transitions. [2022-01-31 21:03:34,036 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 499 transitions. Word has length 65 [2022-01-31 21:03:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:34,036 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 499 transitions. [2022-01-31 21:03:34,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:03:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 499 transitions. [2022-01-31 21:03:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:03:34,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:34,037 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:34,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 21:03:34,037 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1011631838, now seen corresponding path program 93 times [2022-01-31 21:03:34,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:34,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753594333] [2022-01-31 21:03:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:34,070 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:34,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:34,141 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:34,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:34,141 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:34,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:34,141 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:34,142 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:34,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:34,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:34,967 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:34,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753594333] [2022-01-31 21:03:34,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753594333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:34,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:34,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:03:34,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964172484] [2022-01-31 21:03:34,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:34,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:03:34,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:34,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:03:34,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:03:34,969 INFO L87 Difference]: Start difference. First operand 337 states and 499 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:03:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:36,576 INFO L93 Difference]: Finished difference Result 354 states and 515 transitions. [2022-01-31 21:03:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:03:36,577 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 65 [2022-01-31 21:03:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:36,578 INFO L225 Difference]: With dead ends: 354 [2022-01-31 21:03:36,578 INFO L226 Difference]: Without dead ends: 347 [2022-01-31 21:03:36,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:03:36,579 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 59 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:36,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 170 Invalid, 2746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:03:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-31 21:03:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 337. [2022-01-31 21:03:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.4924012158054711) internal successors, (491), 331 states have internal predecessors, (491), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 498 transitions. [2022-01-31 21:03:36,653 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 498 transitions. Word has length 65 [2022-01-31 21:03:36,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:36,653 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 498 transitions. [2022-01-31 21:03:36,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:03:36,653 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 498 transitions. [2022-01-31 21:03:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:03:36,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:36,653 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:36,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 21:03:36,654 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:36,654 INFO L85 PathProgramCache]: Analyzing trace with hash 577369498, now seen corresponding path program 94 times [2022-01-31 21:03:36,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:36,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973393106] [2022-01-31 21:03:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:36,683 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:36,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:36,752 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:36,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:36,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:36,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:36,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:36,752 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:36,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:36,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:37,760 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973393106] [2022-01-31 21:03:37,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973393106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:37,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:37,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:03:37,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349340418] [2022-01-31 21:03:37,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:37,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:03:37,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:37,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:03:37,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:03:37,761 INFO L87 Difference]: Start difference. First operand 337 states and 498 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:03:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:39,637 INFO L93 Difference]: Finished difference Result 356 states and 516 transitions. [2022-01-31 21:03:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:03:39,638 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 65 [2022-01-31 21:03:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:39,639 INFO L225 Difference]: With dead ends: 356 [2022-01-31 21:03:39,639 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 21:03:39,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:03:39,640 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3364 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:39,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 197 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3364 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:03:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 21:03:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 337. [2022-01-31 21:03:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.4893617021276595) internal successors, (490), 331 states have internal predecessors, (490), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 497 transitions. [2022-01-31 21:03:39,720 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 497 transitions. Word has length 65 [2022-01-31 21:03:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:39,720 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 497 transitions. [2022-01-31 21:03:39,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:03:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 497 transitions. [2022-01-31 21:03:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:03:39,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:39,721 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:39,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 21:03:39,721 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:39,721 INFO L85 PathProgramCache]: Analyzing trace with hash 383590494, now seen corresponding path program 95 times [2022-01-31 21:03:39,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:39,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382758814] [2022-01-31 21:03:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:39,749 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:39,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:39,801 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:39,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:39,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:39,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:39,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:39,802 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:39,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:39,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:40,752 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:40,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382758814] [2022-01-31 21:03:40,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1382758814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:40,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:40,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:03:40,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29714855] [2022-01-31 21:03:40,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:40,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:03:40,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:40,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:03:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:03:40,754 INFO L87 Difference]: Start difference. First operand 337 states and 497 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:03:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:42,913 INFO L93 Difference]: Finished difference Result 357 states and 516 transitions. [2022-01-31 21:03:42,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:03:42,913 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 65 [2022-01-31 21:03:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:42,914 INFO L225 Difference]: With dead ends: 357 [2022-01-31 21:03:42,914 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 21:03:42,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4402 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:03:42,915 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 4168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:42,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 219 Invalid, 4168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:03:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 21:03:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 337. [2022-01-31 21:03:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.486322188449848) internal successors, (489), 331 states have internal predecessors, (489), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 496 transitions. [2022-01-31 21:03:42,990 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 496 transitions. Word has length 65 [2022-01-31 21:03:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:42,990 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 496 transitions. [2022-01-31 21:03:42,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:03:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 496 transitions. [2022-01-31 21:03:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:03:42,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:42,991 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:42,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 21:03:42,991 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:42,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1784443878, now seen corresponding path program 96 times [2022-01-31 21:03:42,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:42,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867716336] [2022-01-31 21:03:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:43,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:43,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:43,134 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:43,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:43,134 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:43,135 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:43,135 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:43,135 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:43,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:43,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:44,202 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867716336] [2022-01-31 21:03:44,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867716336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:44,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:44,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:03:44,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208223919] [2022-01-31 21:03:44,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:44,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:03:44,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:03:44,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:03:44,204 INFO L87 Difference]: Start difference. First operand 337 states and 496 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:03:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:46,873 INFO L93 Difference]: Finished difference Result 442 states and 651 transitions. [2022-01-31 21:03:46,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:03:46,874 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 65 [2022-01-31 21:03:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:46,875 INFO L225 Difference]: With dead ends: 442 [2022-01-31 21:03:46,876 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 21:03:46,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4839 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=515, Invalid=13057, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:03:46,877 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 69 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5191 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 5355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 5191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:46,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 222 Invalid, 5355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 5191 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:03:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 21:03:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 388. [2022-01-31 21:03:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 380 states have (on average 1.5078947368421052) internal successors, (573), 382 states have internal predecessors, (573), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 580 transitions. [2022-01-31 21:03:46,970 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 580 transitions. Word has length 65 [2022-01-31 21:03:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:46,970 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 580 transitions. [2022-01-31 21:03:46,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:03:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 580 transitions. [2022-01-31 21:03:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:03:46,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:46,971 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:46,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 21:03:46,971 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:46,971 INFO L85 PathProgramCache]: Analyzing trace with hash -9436516, now seen corresponding path program 97 times [2022-01-31 21:03:46,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:46,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25995661] [2022-01-31 21:03:46,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:47,018 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:47,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:47,095 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:47,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:47,095 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:47,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:47,095 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:47,095 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:47,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:47,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:48,242 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:48,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25995661] [2022-01-31 21:03:48,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [25995661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:48,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:48,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:03:48,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660916101] [2022-01-31 21:03:48,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:48,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:03:48,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:48,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:03:48,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:03:48,244 INFO L87 Difference]: Start difference. First operand 388 states and 580 transitions. Second operand has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 59 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 21:03:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:50,713 INFO L93 Difference]: Finished difference Result 415 states and 609 transitions. [2022-01-31 21:03:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:03:50,713 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 59 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 65 [2022-01-31 21:03:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:50,715 INFO L225 Difference]: With dead ends: 415 [2022-01-31 21:03:50,715 INFO L226 Difference]: Without dead ends: 407 [2022-01-31 21:03:50,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5180 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=535, Invalid=13985, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 21:03:50,715 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4569 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 4697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:50,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 222 Invalid, 4697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4569 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:03:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-31 21:03:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 390. [2022-01-31 21:03:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.5052356020942408) internal successors, (575), 384 states have internal predecessors, (575), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 582 transitions. [2022-01-31 21:03:50,812 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 582 transitions. Word has length 65 [2022-01-31 21:03:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:50,812 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 582 transitions. [2022-01-31 21:03:50,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 59 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 21:03:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 582 transitions. [2022-01-31 21:03:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:03:50,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:50,813 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:50,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 21:03:50,813 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:50,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1161656798, now seen corresponding path program 98 times [2022-01-31 21:03:50,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:50,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669225691] [2022-01-31 21:03:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:50,841 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:50,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:50,909 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:50,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:50,910 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:50,910 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:50,910 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:50,910 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:50,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:50,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:51,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:51,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669225691] [2022-01-31 21:03:51,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1669225691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:51,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:51,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:03:51,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757131070] [2022-01-31 21:03:51,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:51,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:03:51,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:51,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:03:51,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:03:51,494 INFO L87 Difference]: Start difference. First operand 390 states and 582 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:03:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:52,381 INFO L93 Difference]: Finished difference Result 398 states and 589 transitions. [2022-01-31 21:03:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:03:52,381 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 68 [2022-01-31 21:03:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:52,381 INFO L225 Difference]: With dead ends: 398 [2022-01-31 21:03:52,382 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 21:03:52,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:03:52,382 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:52,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 111 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:03:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 21:03:52,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2022-01-31 21:03:52,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.5026178010471205) internal successors, (574), 384 states have internal predecessors, (574), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 581 transitions. [2022-01-31 21:03:52,481 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 581 transitions. Word has length 68 [2022-01-31 21:03:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:52,481 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 581 transitions. [2022-01-31 21:03:52,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:03:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 581 transitions. [2022-01-31 21:03:52,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:03:52,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:52,481 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:52,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 21:03:52,481 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:52,482 INFO L85 PathProgramCache]: Analyzing trace with hash 49416166, now seen corresponding path program 99 times [2022-01-31 21:03:52,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:52,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386722106] [2022-01-31 21:03:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:52,519 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:52,572 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:52,573 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:52,573 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:52,573 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:52,573 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:52,573 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:52,573 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:52,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:52,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:53,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:53,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386722106] [2022-01-31 21:03:53,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1386722106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:53,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:53,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:03:53,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41212698] [2022-01-31 21:03:53,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:53,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:03:53,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:03:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:03:53,257 INFO L87 Difference]: Start difference. First operand 390 states and 581 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:03:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:54,298 INFO L93 Difference]: Finished difference Result 400 states and 590 transitions. [2022-01-31 21:03:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:03:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 68 [2022-01-31 21:03:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:54,299 INFO L225 Difference]: With dead ends: 400 [2022-01-31 21:03:54,299 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 21:03:54,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:03:54,300 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:54,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 128 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:03:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 21:03:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2022-01-31 21:03:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.5) internal successors, (573), 384 states have internal predecessors, (573), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 580 transitions. [2022-01-31 21:03:54,393 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 580 transitions. Word has length 68 [2022-01-31 21:03:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:54,393 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 580 transitions. [2022-01-31 21:03:54,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:03:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 580 transitions. [2022-01-31 21:03:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:03:54,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:54,394 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:54,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 21:03:54,394 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:54,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:54,394 INFO L85 PathProgramCache]: Analyzing trace with hash -600605534, now seen corresponding path program 100 times [2022-01-31 21:03:54,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:54,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403595038] [2022-01-31 21:03:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:54,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:54,506 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:54,506 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:54,506 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:54,506 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:54,506 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:54,506 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:54,507 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:54,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:54,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:55,305 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:55,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403595038] [2022-01-31 21:03:55,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403595038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:55,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:55,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:03:55,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570097680] [2022-01-31 21:03:55,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:55,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:03:55,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:55,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:03:55,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:03:55,306 INFO L87 Difference]: Start difference. First operand 390 states and 580 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:03:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:56,581 INFO L93 Difference]: Finished difference Result 402 states and 591 transitions. [2022-01-31 21:03:56,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:03:56,581 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 68 [2022-01-31 21:03:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:56,582 INFO L225 Difference]: With dead ends: 402 [2022-01-31 21:03:56,582 INFO L226 Difference]: Without dead ends: 395 [2022-01-31 21:03:56,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:03:56,583 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:56,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 150 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1904 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:03:56,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-01-31 21:03:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 390. [2022-01-31 21:03:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.4973821989528795) internal successors, (572), 384 states have internal predecessors, (572), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 579 transitions. [2022-01-31 21:03:56,724 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 579 transitions. Word has length 68 [2022-01-31 21:03:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:56,724 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 579 transitions. [2022-01-31 21:03:56,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:03:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 579 transitions. [2022-01-31 21:03:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:03:56,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:56,725 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:56,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 21:03:56,725 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash -678911642, now seen corresponding path program 101 times [2022-01-31 21:03:56,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:56,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114918179] [2022-01-31 21:03:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:56,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:56,844 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:56,845 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:56,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:56,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:56,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:56,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:56,845 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:56,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:56,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:57,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:57,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114918179] [2022-01-31 21:03:57,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [114918179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:57,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:57,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:03:57,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615708838] [2022-01-31 21:03:57,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:57,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:03:57,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:57,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:03:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:03:57,666 INFO L87 Difference]: Start difference. First operand 390 states and 579 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:03:59,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:59,042 INFO L93 Difference]: Finished difference Result 404 states and 592 transitions. [2022-01-31 21:03:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:03:59,042 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 68 [2022-01-31 21:03:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:59,043 INFO L225 Difference]: With dead ends: 404 [2022-01-31 21:03:59,043 INFO L226 Difference]: Without dead ends: 397 [2022-01-31 21:03:59,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:03:59,044 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:59,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 152 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:03:59,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-31 21:03:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 390. [2022-01-31 21:03:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.4947643979057592) internal successors, (571), 384 states have internal predecessors, (571), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:03:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 578 transitions. [2022-01-31 21:03:59,133 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 578 transitions. Word has length 68 [2022-01-31 21:03:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:59,133 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 578 transitions. [2022-01-31 21:03:59,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:03:59,133 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 578 transitions. [2022-01-31 21:03:59,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:03:59,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:59,134 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:59,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 21:03:59,134 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:59,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:59,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1228886818, now seen corresponding path program 102 times [2022-01-31 21:03:59,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:59,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439016231] [2022-01-31 21:03:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:59,164 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:59,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:59,246 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:59,247 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:59,247 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:59,247 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:59,247 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:03:59,247 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:59,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:59,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:00,216 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:00,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439016231] [2022-01-31 21:04:00,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1439016231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:00,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:00,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:04:00,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407159978] [2022-01-31 21:04:00,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:00,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:04:00,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:00,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:04:00,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:04:00,218 INFO L87 Difference]: Start difference. First operand 390 states and 578 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:04:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:01,913 INFO L93 Difference]: Finished difference Result 406 states and 593 transitions. [2022-01-31 21:04:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:04:01,915 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 68 [2022-01-31 21:04:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:01,916 INFO L225 Difference]: With dead ends: 406 [2022-01-31 21:04:01,916 INFO L226 Difference]: Without dead ends: 399 [2022-01-31 21:04:01,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:04:01,917 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2945 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:01,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 189 Invalid, 3038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2945 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:04:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-01-31 21:04:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 390. [2022-01-31 21:04:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.4921465968586387) internal successors, (570), 384 states have internal predecessors, (570), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 577 transitions. [2022-01-31 21:04:02,011 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 577 transitions. Word has length 68 [2022-01-31 21:04:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:02,011 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 577 transitions. [2022-01-31 21:04:02,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:04:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 577 transitions. [2022-01-31 21:04:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:04:02,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:02,012 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:02,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 21:04:02,012 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash 561011430, now seen corresponding path program 103 times [2022-01-31 21:04:02,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:02,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963686046] [2022-01-31 21:04:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:02,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:02,125 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:02,125 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:02,125 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:02,125 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:02,125 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:02,125 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:02,126 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:02,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:02,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:03,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:03,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963686046] [2022-01-31 21:04:03,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1963686046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:03,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:03,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:04:03,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263195917] [2022-01-31 21:04:03,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:03,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:04:03,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:03,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:04:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:04:03,089 INFO L87 Difference]: Start difference. First operand 390 states and 577 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:04:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:04,915 INFO L93 Difference]: Finished difference Result 408 states and 594 transitions. [2022-01-31 21:04:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:04:04,916 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 68 [2022-01-31 21:04:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:04,916 INFO L225 Difference]: With dead ends: 408 [2022-01-31 21:04:04,916 INFO L226 Difference]: Without dead ends: 401 [2022-01-31 21:04:04,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:04:04,917 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3112 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:04,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 186 Invalid, 3210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3112 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:04:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-31 21:04:05,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 390. [2022-01-31 21:04:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.4895287958115184) internal successors, (569), 384 states have internal predecessors, (569), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 576 transitions. [2022-01-31 21:04:05,011 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 576 transitions. Word has length 68 [2022-01-31 21:04:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:05,011 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 576 transitions. [2022-01-31 21:04:05,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:04:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 576 transitions. [2022-01-31 21:04:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:04:05,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:05,012 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:05,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 21:04:05,012 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:05,012 INFO L85 PathProgramCache]: Analyzing trace with hash 126749090, now seen corresponding path program 104 times [2022-01-31 21:04:05,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:05,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922767937] [2022-01-31 21:04:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:05,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:05,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:05,116 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:05,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:05,116 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:05,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:05,116 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:05,116 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:05,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:05,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:05,164 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 21:04:06,177 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:06,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922767937] [2022-01-31 21:04:06,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [922767937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:06,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:06,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:04:06,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336774632] [2022-01-31 21:04:06,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:06,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:04:06,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:06,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:04:06,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:04:06,179 INFO L87 Difference]: Start difference. First operand 390 states and 576 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:04:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:08,152 INFO L93 Difference]: Finished difference Result 410 states and 595 transitions. [2022-01-31 21:04:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:04:08,152 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 68 [2022-01-31 21:04:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:08,153 INFO L225 Difference]: With dead ends: 410 [2022-01-31 21:04:08,153 INFO L226 Difference]: Without dead ends: 403 [2022-01-31 21:04:08,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4402 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:04:08,154 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3281 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:08,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 183 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3281 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:04:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-31 21:04:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 390. [2022-01-31 21:04:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.486910994764398) internal successors, (568), 384 states have internal predecessors, (568), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 575 transitions. [2022-01-31 21:04:08,248 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 575 transitions. Word has length 68 [2022-01-31 21:04:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:08,248 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 575 transitions. [2022-01-31 21:04:08,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:04:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 575 transitions. [2022-01-31 21:04:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:04:08,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:08,248 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:08,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 21:04:08,248 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:08,249 INFO L85 PathProgramCache]: Analyzing trace with hash -67029914, now seen corresponding path program 105 times [2022-01-31 21:04:08,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:08,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66407366] [2022-01-31 21:04:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:08,277 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:08,351 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:08,351 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:08,351 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:08,351 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:08,351 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:08,351 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:08,351 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:08,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:08,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:08,387 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 21:04:09,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:09,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66407366] [2022-01-31 21:04:09,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [66407366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:09,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:09,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:04:09,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881612573] [2022-01-31 21:04:09,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:09,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:04:09,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:09,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:04:09,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:04:09,391 INFO L87 Difference]: Start difference. First operand 390 states and 575 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:04:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:11,570 INFO L93 Difference]: Finished difference Result 411 states and 595 transitions. [2022-01-31 21:04:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:04:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 68 [2022-01-31 21:04:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:11,571 INFO L225 Difference]: With dead ends: 411 [2022-01-31 21:04:11,571 INFO L226 Difference]: Without dead ends: 404 [2022-01-31 21:04:11,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4946 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:04:11,572 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 3867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:11,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 195 Invalid, 3867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:04:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-31 21:04:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 390. [2022-01-31 21:04:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.4842931937172774) internal successors, (567), 384 states have internal predecessors, (567), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 574 transitions. [2022-01-31 21:04:11,662 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 574 transitions. Word has length 68 [2022-01-31 21:04:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:11,662 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 574 transitions. [2022-01-31 21:04:11,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:04:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 574 transitions. [2022-01-31 21:04:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:04:11,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:11,662 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:11,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 21:04:11,662 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:11,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2059903010, now seen corresponding path program 106 times [2022-01-31 21:04:11,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:11,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183904265] [2022-01-31 21:04:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:11,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:11,750 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:11,751 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:11,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:11,751 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:11,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:11,751 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:11,751 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:11,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:12,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:12,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183904265] [2022-01-31 21:04:12,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [183904265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:12,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:12,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:04:12,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097490704] [2022-01-31 21:04:12,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:12,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:04:12,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:04:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:04:12,953 INFO L87 Difference]: Start difference. First operand 390 states and 574 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:04:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:15,983 INFO L93 Difference]: Finished difference Result 501 states and 738 transitions. [2022-01-31 21:04:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:04:15,983 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 68 [2022-01-31 21:04:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:15,985 INFO L225 Difference]: With dead ends: 501 [2022-01-31 21:04:15,985 INFO L226 Difference]: Without dead ends: 476 [2022-01-31 21:04:15,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5496 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=544, Invalid=14462, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:04:15,986 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 68 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 6231 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 6403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 6231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:15,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 249 Invalid, 6403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 6231 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:04:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-31 21:04:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 444. [2022-01-31 21:04:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 436 states have (on average 1.5045871559633028) internal successors, (656), 438 states have internal predecessors, (656), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 663 transitions. [2022-01-31 21:04:16,098 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 663 transitions. Word has length 68 [2022-01-31 21:04:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:16,098 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 663 transitions. [2022-01-31 21:04:16,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:04:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 663 transitions. [2022-01-31 21:04:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:04:16,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:16,099 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:16,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 21:04:16,099 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash -460056924, now seen corresponding path program 107 times [2022-01-31 21:04:16,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:16,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839890174] [2022-01-31 21:04:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:16,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:16,206 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:16,206 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:16,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:16,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:16,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:16,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:16,207 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:16,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:16,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:16,243 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 21:04:17,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:17,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839890174] [2022-01-31 21:04:17,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839890174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:17,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:17,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 21:04:17,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834205492] [2022-01-31 21:04:17,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:17,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 21:04:17,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 21:04:17,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3970, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:04:17,374 INFO L87 Difference]: Start difference. First operand 444 states and 663 transitions. Second operand has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 62 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 21:04:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:20,161 INFO L93 Difference]: Finished difference Result 472 states and 693 transitions. [2022-01-31 21:04:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 21:04:20,161 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 21:04:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:20,162 INFO L225 Difference]: With dead ends: 472 [2022-01-31 21:04:20,162 INFO L226 Difference]: Without dead ends: 464 [2022-01-31 21:04:20,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5952 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=564, Invalid=15438, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 21:04:20,163 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5285 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 5418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 5285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:20,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 243 Invalid, 5418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 5285 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:04:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-31 21:04:20,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 446. [2022-01-31 21:04:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 438 states have (on average 1.5022831050228311) internal successors, (658), 440 states have internal predecessors, (658), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 665 transitions. [2022-01-31 21:04:20,269 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 665 transitions. Word has length 68 [2022-01-31 21:04:20,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:20,269 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 665 transitions. [2022-01-31 21:04:20,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 62 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 21:04:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 665 transitions. [2022-01-31 21:04:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:20,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:20,269 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:20,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 21:04:20,269 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:20,270 INFO L85 PathProgramCache]: Analyzing trace with hash -875848354, now seen corresponding path program 108 times [2022-01-31 21:04:20,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:20,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402152749] [2022-01-31 21:04:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:20,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:20,389 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:20,390 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:20,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:20,390 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:20,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:20,390 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:20,390 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:20,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:20,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:20,433 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 21:04:21,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:21,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402152749] [2022-01-31 21:04:21,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [402152749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:21,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:21,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:04:21,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581215620] [2022-01-31 21:04:21,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:21,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:04:21,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:21,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:04:21,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:04:21,032 INFO L87 Difference]: Start difference. First operand 446 states and 665 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:04:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:22,014 INFO L93 Difference]: Finished difference Result 453 states and 671 transitions. [2022-01-31 21:04:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:04:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 71 [2022-01-31 21:04:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:22,015 INFO L225 Difference]: With dead ends: 453 [2022-01-31 21:04:22,016 INFO L226 Difference]: Without dead ends: 446 [2022-01-31 21:04:22,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:04:22,016 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:22,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 140 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:04:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-31 21:04:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 417. [2022-01-31 21:04:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.5134474327628362) internal successors, (619), 411 states have internal predecessors, (619), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 626 transitions. [2022-01-31 21:04:22,128 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 626 transitions. Word has length 71 [2022-01-31 21:04:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:22,128 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 626 transitions. [2022-01-31 21:04:22,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 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 21:04:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 626 transitions. [2022-01-31 21:04:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:22,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:22,128 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:22,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 21:04:22,128 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash 473535770, now seen corresponding path program 109 times [2022-01-31 21:04:22,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:22,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885092316] [2022-01-31 21:04:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:22,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:22,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:22,207 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:22,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:22,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:22,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:22,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:22,208 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:22,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:22,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:22,247 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 21:04:22,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:22,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885092316] [2022-01-31 21:04:22,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1885092316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:22,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:22,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:04:22,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013453] [2022-01-31 21:04:22,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:22,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:04:22,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:22,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:04:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:04:22,861 INFO L87 Difference]: Start difference. First operand 417 states and 626 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:04:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:23,988 INFO L93 Difference]: Finished difference Result 426 states and 634 transitions. [2022-01-31 21:04:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:04:23,989 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 71 [2022-01-31 21:04:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:23,989 INFO L225 Difference]: With dead ends: 426 [2022-01-31 21:04:23,990 INFO L226 Difference]: Without dead ends: 419 [2022-01-31 21:04:23,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=355, Invalid=6125, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:04:23,990 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:23,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 147 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:04:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-31 21:04:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2022-01-31 21:04:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.511002444987775) internal successors, (618), 411 states have internal predecessors, (618), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 625 transitions. [2022-01-31 21:04:24,095 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 625 transitions. Word has length 71 [2022-01-31 21:04:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:24,095 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 625 transitions. [2022-01-31 21:04:24,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:04:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 625 transitions. [2022-01-31 21:04:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:24,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:24,096 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:24,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 21:04:24,096 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:24,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1684608734, now seen corresponding path program 110 times [2022-01-31 21:04:24,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:24,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092898720] [2022-01-31 21:04:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:24,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:24,201 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:24,202 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:24,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:24,202 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:24,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:24,202 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:24,202 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:24,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:24,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:24,934 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092898720] [2022-01-31 21:04:24,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092898720] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:24,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:24,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:04:24,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30587917] [2022-01-31 21:04:24,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:24,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:04:24,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:04:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:04:24,936 INFO L87 Difference]: Start difference. First operand 417 states and 625 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:04:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:26,137 INFO L93 Difference]: Finished difference Result 428 states and 635 transitions. [2022-01-31 21:04:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:04:26,137 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 71 [2022-01-31 21:04:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:26,138 INFO L225 Difference]: With dead ends: 428 [2022-01-31 21:04:26,138 INFO L226 Difference]: Without dead ends: 421 [2022-01-31 21:04:26,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:04:26,138 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:26,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 139 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:04:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-31 21:04:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 417. [2022-01-31 21:04:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.5085574572127138) internal successors, (617), 411 states have internal predecessors, (617), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 624 transitions. [2022-01-31 21:04:26,239 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 624 transitions. Word has length 71 [2022-01-31 21:04:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:26,239 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 624 transitions. [2022-01-31 21:04:26,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:04:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 624 transitions. [2022-01-31 21:04:26,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:26,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:26,240 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:26,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 21:04:26,240 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1034587034, now seen corresponding path program 111 times [2022-01-31 21:04:26,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498935159] [2022-01-31 21:04:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:26,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:26,320 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:26,321 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:26,321 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:26,321 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:26,321 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:26,321 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:26,321 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:26,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:26,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:27,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:27,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498935159] [2022-01-31 21:04:27,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498935159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:27,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:27,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:04:27,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336196329] [2022-01-31 21:04:27,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:27,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:04:27,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:04:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:04:27,133 INFO L87 Difference]: Start difference. First operand 417 states and 624 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:04:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:28,500 INFO L93 Difference]: Finished difference Result 430 states and 636 transitions. [2022-01-31 21:04:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:04:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 71 [2022-01-31 21:04:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:28,501 INFO L225 Difference]: With dead ends: 430 [2022-01-31 21:04:28,501 INFO L226 Difference]: Without dead ends: 423 [2022-01-31 21:04:28,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3065 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:04:28,502 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:28,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 151 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:04:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-31 21:04:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 417. [2022-01-31 21:04:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.5061124694376529) internal successors, (616), 411 states have internal predecessors, (616), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 623 transitions. [2022-01-31 21:04:28,608 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 623 transitions. Word has length 71 [2022-01-31 21:04:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:28,608 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 623 transitions. [2022-01-31 21:04:28,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:04:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 623 transitions. [2022-01-31 21:04:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:28,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:28,608 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:28,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 21:04:28,609 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:28,609 INFO L85 PathProgramCache]: Analyzing trace with hash 956280926, now seen corresponding path program 112 times [2022-01-31 21:04:28,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:28,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014331035] [2022-01-31 21:04:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:28,643 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:28,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:28,727 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:28,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:28,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:28,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:28,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:28,728 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:28,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:28,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:29,577 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:29,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014331035] [2022-01-31 21:04:29,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014331035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:29,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:29,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:04:29,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312745145] [2022-01-31 21:04:29,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:29,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:04:29,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:29,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:04:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:04:29,579 INFO L87 Difference]: Start difference. First operand 417 states and 623 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:04:31,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:31,184 INFO L93 Difference]: Finished difference Result 432 states and 637 transitions. [2022-01-31 21:04:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:04:31,185 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 71 [2022-01-31 21:04:31,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:31,185 INFO L225 Difference]: With dead ends: 432 [2022-01-31 21:04:31,185 INFO L226 Difference]: Without dead ends: 425 [2022-01-31 21:04:31,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:04:31,186 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:31,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 173 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:04:31,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-31 21:04:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 417. [2022-01-31 21:04:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.5036674816625917) internal successors, (615), 411 states have internal predecessors, (615), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 622 transitions. [2022-01-31 21:04:31,288 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 622 transitions. Word has length 71 [2022-01-31 21:04:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:31,288 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 622 transitions. [2022-01-31 21:04:31,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:04:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 622 transitions. [2022-01-31 21:04:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:31,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:31,288 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:31,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 21:04:31,289 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1430887910, now seen corresponding path program 113 times [2022-01-31 21:04:31,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:31,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889328184] [2022-01-31 21:04:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:31,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:31,398 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:31,399 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:31,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:31,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:31,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:31,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:31,399 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:31,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:31,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:32,295 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:32,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889328184] [2022-01-31 21:04:32,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1889328184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:32,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:32,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:04:32,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578595486] [2022-01-31 21:04:32,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:32,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:04:32,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:32,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:04:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:04:32,296 INFO L87 Difference]: Start difference. First operand 417 states and 622 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:04:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:34,176 INFO L93 Difference]: Finished difference Result 434 states and 638 transitions. [2022-01-31 21:04:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:04:34,176 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 71 [2022-01-31 21:04:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:34,177 INFO L225 Difference]: With dead ends: 434 [2022-01-31 21:04:34,177 INFO L226 Difference]: Without dead ends: 427 [2022-01-31 21:04:34,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:04:34,178 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 61 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3234 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:34,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 195 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3234 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:04:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-31 21:04:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 417. [2022-01-31 21:04:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.5012224938875305) internal successors, (614), 411 states have internal predecessors, (614), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 621 transitions. [2022-01-31 21:04:34,283 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 621 transitions. Word has length 71 [2022-01-31 21:04:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:34,283 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 621 transitions. [2022-01-31 21:04:34,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:04:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 621 transitions. [2022-01-31 21:04:34,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:34,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:34,283 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:34,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 21:04:34,283 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2098763298, now seen corresponding path program 114 times [2022-01-31 21:04:34,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:34,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654853350] [2022-01-31 21:04:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:34,321 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:34,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:34,370 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:34,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:34,370 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:34,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:34,370 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:34,371 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:34,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:34,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:35,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:35,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654853350] [2022-01-31 21:04:35,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1654853350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:35,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:35,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:04:35,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701019635] [2022-01-31 21:04:35,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:35,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:04:35,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:35,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:04:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:04:35,356 INFO L87 Difference]: Start difference. First operand 417 states and 621 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:04:37,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:37,392 INFO L93 Difference]: Finished difference Result 436 states and 639 transitions. [2022-01-31 21:04:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:04:37,392 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 71 [2022-01-31 21:04:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:37,393 INFO L225 Difference]: With dead ends: 436 [2022-01-31 21:04:37,393 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 21:04:37,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4315 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=11720, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:04:37,394 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3510 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:37,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 197 Invalid, 3615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3510 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:04:37,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 21:04:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 417. [2022-01-31 21:04:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.4987775061124695) internal successors, (613), 411 states have internal predecessors, (613), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 620 transitions. [2022-01-31 21:04:37,495 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 620 transitions. Word has length 71 [2022-01-31 21:04:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:37,495 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 620 transitions. [2022-01-31 21:04:37,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:04:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 620 transitions. [2022-01-31 21:04:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:37,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:37,495 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:37,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 21:04:37,496 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:37,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1761941658, now seen corresponding path program 115 times [2022-01-31 21:04:37,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:37,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684057147] [2022-01-31 21:04:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:37,523 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:37,591 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:37,591 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:37,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:37,592 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:37,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:37,592 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:37,592 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:37,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:37,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:38,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:38,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684057147] [2022-01-31 21:04:38,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1684057147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:38,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:38,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:04:38,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032168908] [2022-01-31 21:04:38,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:38,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:04:38,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:38,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:04:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:04:38,639 INFO L87 Difference]: Start difference. First operand 417 states and 620 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:04:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:41,030 INFO L93 Difference]: Finished difference Result 438 states and 640 transitions. [2022-01-31 21:04:41,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:04:41,030 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 71 [2022-01-31 21:04:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:41,031 INFO L225 Difference]: With dead ends: 438 [2022-01-31 21:04:41,031 INFO L226 Difference]: Without dead ends: 431 [2022-01-31 21:04:41,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4954 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:04:41,032 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 64 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4436 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 4436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:41,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 229 Invalid, 4546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 4436 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:04:41,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-31 21:04:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 417. [2022-01-31 21:04:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.4963325183374083) internal successors, (612), 411 states have internal predecessors, (612), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 619 transitions. [2022-01-31 21:04:41,138 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 619 transitions. Word has length 71 [2022-01-31 21:04:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:41,138 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 619 transitions. [2022-01-31 21:04:41,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:04:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 619 transitions. [2022-01-31 21:04:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:41,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:41,138 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:41,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 21:04:41,138 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:41,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1568162654, now seen corresponding path program 116 times [2022-01-31 21:04:41,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:41,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687182145] [2022-01-31 21:04:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:41,176 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:41,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:41,225 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:41,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:41,225 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:41,226 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:41,226 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:41,226 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:41,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:41,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:42,375 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:42,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687182145] [2022-01-31 21:04:42,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687182145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:42,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:42,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:04:42,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87699165] [2022-01-31 21:04:42,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:42,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:04:42,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:42,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:04:42,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:04:42,376 INFO L87 Difference]: Start difference. First operand 417 states and 619 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:04:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:44,886 INFO L93 Difference]: Finished difference Result 439 states and 640 transitions. [2022-01-31 21:04:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:04:44,886 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 71 [2022-01-31 21:04:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:44,887 INFO L225 Difference]: With dead ends: 439 [2022-01-31 21:04:44,887 INFO L226 Difference]: Without dead ends: 432 [2022-01-31 21:04:44,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5505 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:04:44,888 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 4648 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 4764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:44,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 226 Invalid, 4764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4648 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:04:44,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-31 21:04:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 417. [2022-01-31 21:04:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.4938875305623471) internal successors, (611), 411 states have internal predecessors, (611), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 618 transitions. [2022-01-31 21:04:44,995 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 618 transitions. Word has length 71 [2022-01-31 21:04:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:44,995 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 618 transitions. [2022-01-31 21:04:44,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:04:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 618 transitions. [2022-01-31 21:04:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:44,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:44,996 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:44,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 21:04:44,996 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash -599871718, now seen corresponding path program 117 times [2022-01-31 21:04:44,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:44,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575481419] [2022-01-31 21:04:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:45,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:45,103 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:45,103 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:45,103 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:45,103 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:45,103 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:45,103 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:45,103 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:45,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:45,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:46,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:46,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575481419] [2022-01-31 21:04:46,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1575481419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:46,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:46,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:04:46,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97756895] [2022-01-31 21:04:46,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:46,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:04:46,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:04:46,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:04:46,357 INFO L87 Difference]: Start difference. First operand 417 states and 618 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:04:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:49,537 INFO L93 Difference]: Finished difference Result 534 states and 791 transitions. [2022-01-31 21:04:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:04:49,538 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 71 [2022-01-31 21:04:49,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:49,539 INFO L225 Difference]: With dead ends: 534 [2022-01-31 21:04:49,539 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 21:04:49,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5975 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=569, Invalid=15943, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:04:49,540 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 74 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6399 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 6581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 6399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:49,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 246 Invalid, 6581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 6399 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:04:49,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 21:04:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 474. [2022-01-31 21:04:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 466 states have (on average 1.5128755364806867) internal successors, (705), 468 states have internal predecessors, (705), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 712 transitions. [2022-01-31 21:04:49,667 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 712 transitions. Word has length 71 [2022-01-31 21:04:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:49,668 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 712 transitions. [2022-01-31 21:04:49,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:04:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 712 transitions. [2022-01-31 21:04:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:04:49,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:49,668 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:49,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 21:04:49,668 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1175135644, now seen corresponding path program 118 times [2022-01-31 21:04:49,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:49,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671020506] [2022-01-31 21:04:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:49,706 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:49,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:49,776 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:49,776 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:49,776 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:49,776 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:49,776 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:49,776 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:49,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:49,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:51,002 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:51,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671020506] [2022-01-31 21:04:51,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671020506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:51,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:51,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:04:51,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59564602] [2022-01-31 21:04:51,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:51,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:04:51,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:51,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:04:51,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4357, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:04:51,003 INFO L87 Difference]: Start difference. First operand 474 states and 712 transitions. Second operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 65 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 21:04:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:53,933 INFO L93 Difference]: Finished difference Result 503 states and 743 transitions. [2022-01-31 21:04:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:04:53,933 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 21:04:53,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:53,935 INFO L225 Difference]: With dead ends: 503 [2022-01-31 21:04:53,935 INFO L226 Difference]: Without dead ends: 495 [2022-01-31 21:04:53,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6466 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=591, Invalid=16965, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 21:04:53,936 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 84 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5548 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 5687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 5548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:53,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 244 Invalid, 5687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 5548 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:04:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-31 21:04:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 476. [2022-01-31 21:04:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5106837606837606) internal successors, (707), 470 states have internal predecessors, (707), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 714 transitions. [2022-01-31 21:04:54,063 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 714 transitions. Word has length 71 [2022-01-31 21:04:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:54,063 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 714 transitions. [2022-01-31 21:04:54,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 65 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 21:04:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 714 transitions. [2022-01-31 21:04:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:04:54,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:54,064 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:54,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 21:04:54,064 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash -373126298, now seen corresponding path program 119 times [2022-01-31 21:04:54,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:54,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672719412] [2022-01-31 21:04:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:54,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:54,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:54,152 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:54,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:54,152 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:54,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:54,152 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:54,152 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:54,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:54,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:54,875 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:54,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672719412] [2022-01-31 21:04:54,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [672719412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:54,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:54,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:04:54,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665249900] [2022-01-31 21:04:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:54,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:04:54,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:54,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:04:54,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:04:54,876 INFO L87 Difference]: Start difference. First operand 476 states and 714 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:04:55,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:55,906 INFO L93 Difference]: Finished difference Result 484 states and 721 transitions. [2022-01-31 21:04:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:04:55,906 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 74 [2022-01-31 21:04:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:55,907 INFO L225 Difference]: With dead ends: 484 [2022-01-31 21:04:55,907 INFO L226 Difference]: Without dead ends: 477 [2022-01-31 21:04:55,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:04:55,908 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:55,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 126 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:04:55,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-31 21:04:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 476. [2022-01-31 21:04:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5085470085470085) internal successors, (706), 470 states have internal predecessors, (706), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 713 transitions. [2022-01-31 21:04:56,033 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 713 transitions. Word has length 74 [2022-01-31 21:04:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:56,033 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 713 transitions. [2022-01-31 21:04:56,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:04:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 713 transitions. [2022-01-31 21:04:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:04:56,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:56,033 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:56,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 21:04:56,033 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:56,034 INFO L85 PathProgramCache]: Analyzing trace with hash 976257826, now seen corresponding path program 120 times [2022-01-31 21:04:56,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:56,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737323629] [2022-01-31 21:04:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:56,061 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:56,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:56,129 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:56,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:56,129 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:56,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:56,129 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:56,129 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:56,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:56,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:56,917 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:56,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737323629] [2022-01-31 21:04:56,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1737323629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:56,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:56,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:04:56,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050234835] [2022-01-31 21:04:56,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:56,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:04:56,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:56,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:04:56,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:04:56,918 INFO L87 Difference]: Start difference. First operand 476 states and 713 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:04:58,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:58,316 INFO L93 Difference]: Finished difference Result 486 states and 722 transitions. [2022-01-31 21:04:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:04:58,317 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 74 [2022-01-31 21:04:58,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:58,318 INFO L225 Difference]: With dead ends: 486 [2022-01-31 21:04:58,318 INFO L226 Difference]: Without dead ends: 479 [2022-01-31 21:04:58,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2564 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:04:58,319 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:58,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 178 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2195 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:04:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-31 21:04:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 476. [2022-01-31 21:04:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5064102564102564) internal successors, (705), 470 states have internal predecessors, (705), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:04:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 712 transitions. [2022-01-31 21:04:58,460 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 712 transitions. Word has length 74 [2022-01-31 21:04:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:58,460 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 712 transitions. [2022-01-31 21:04:58,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:04:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 712 transitions. [2022-01-31 21:04:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:04:58,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:58,460 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:58,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 21:04:58,460 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2107636506, now seen corresponding path program 121 times [2022-01-31 21:04:58,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:58,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858675870] [2022-01-31 21:04:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:58,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:58,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:58,537 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:58,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:58,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:58,538 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:58,538 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:04:58,538 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:58,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:58,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:58,577 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 21:04:59,287 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:59,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858675870] [2022-01-31 21:04:59,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [858675870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:59,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:59,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:04:59,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317954351] [2022-01-31 21:04:59,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:59,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:04:59,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:59,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:04:59,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:04:59,288 INFO L87 Difference]: Start difference. First operand 476 states and 712 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:05:00,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:00,631 INFO L93 Difference]: Finished difference Result 488 states and 723 transitions. [2022-01-31 21:05:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:05:00,632 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 74 [2022-01-31 21:05:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:00,632 INFO L225 Difference]: With dead ends: 488 [2022-01-31 21:05:00,632 INFO L226 Difference]: Without dead ends: 481 [2022-01-31 21:05:00,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:05:00,633 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:00,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 145 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:05:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-31 21:05:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 476. [2022-01-31 21:05:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5042735042735043) internal successors, (704), 470 states have internal predecessors, (704), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 711 transitions. [2022-01-31 21:05:00,758 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 711 transitions. Word has length 74 [2022-01-31 21:05:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:00,758 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 711 transitions. [2022-01-31 21:05:00,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:05:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 711 transitions. [2022-01-31 21:05:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:05:00,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:00,759 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:00,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 21:05:00,759 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1537309090, now seen corresponding path program 122 times [2022-01-31 21:05:00,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:00,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381580385] [2022-01-31 21:05:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:00,796 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:00,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:00,865 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:00,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:00,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:00,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:00,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:00,865 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:00,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:00,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:01,704 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:01,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381580385] [2022-01-31 21:05:01,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [381580385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:01,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:01,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:05:01,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448187491] [2022-01-31 21:05:01,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:01,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:05:01,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:01,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:05:01,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:05:01,705 INFO L87 Difference]: Start difference. First operand 476 states and 711 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:05:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:03,310 INFO L93 Difference]: Finished difference Result 490 states and 724 transitions. [2022-01-31 21:05:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:05:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 74 [2022-01-31 21:05:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:03,311 INFO L225 Difference]: With dead ends: 490 [2022-01-31 21:05:03,311 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 21:05:03,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3504 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:05:03,312 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:03,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 177 Invalid, 2728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2636 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:05:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 21:05:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 476. [2022-01-31 21:05:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5021367521367521) internal successors, (703), 470 states have internal predecessors, (703), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 710 transitions. [2022-01-31 21:05:03,438 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 710 transitions. Word has length 74 [2022-01-31 21:05:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:03,438 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 710 transitions. [2022-01-31 21:05:03,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:05:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 710 transitions. [2022-01-31 21:05:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:05:03,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:03,438 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:03,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 21:05:03,438 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1459002982, now seen corresponding path program 123 times [2022-01-31 21:05:03,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:03,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203281845] [2022-01-31 21:05:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:03,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:03,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:03,550 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:03,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:03,550 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:03,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:03,550 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:03,550 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:03,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:03,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:04,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203281845] [2022-01-31 21:05:04,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [203281845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:04,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:04,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:05:04,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820562303] [2022-01-31 21:05:04,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:04,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:05:04,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:04,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:05:04,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:05:04,430 INFO L87 Difference]: Start difference. First operand 476 states and 710 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:05:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:06,280 INFO L93 Difference]: Finished difference Result 492 states and 725 transitions. [2022-01-31 21:05:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:05:06,281 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 74 [2022-01-31 21:05:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:06,281 INFO L225 Difference]: With dead ends: 492 [2022-01-31 21:05:06,281 INFO L226 Difference]: Without dead ends: 485 [2022-01-31 21:05:06,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:05:06,282 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3165 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 3263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:06,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 194 Invalid, 3263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3165 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:05:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-31 21:05:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 476. [2022-01-31 21:05:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5) internal successors, (702), 470 states have internal predecessors, (702), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 709 transitions. [2022-01-31 21:05:06,408 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 709 transitions. Word has length 74 [2022-01-31 21:05:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:06,408 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 709 transitions. [2022-01-31 21:05:06,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:05:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 709 transitions. [2022-01-31 21:05:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:05:06,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:06,409 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:06,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 21:05:06,409 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash -928165854, now seen corresponding path program 124 times [2022-01-31 21:05:06,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:06,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556176295] [2022-01-31 21:05:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:06,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:06,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:06,501 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:06,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:06,501 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:06,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:06,501 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:06,501 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:06,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:06,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:07,481 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:07,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556176295] [2022-01-31 21:05:07,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [556176295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:07,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:07,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:05:07,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384996933] [2022-01-31 21:05:07,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:07,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:05:07,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:05:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:05:07,483 INFO L87 Difference]: Start difference. First operand 476 states and 709 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:05:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:09,572 INFO L93 Difference]: Finished difference Result 494 states and 726 transitions. [2022-01-31 21:05:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:05:09,572 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 74 [2022-01-31 21:05:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:09,573 INFO L225 Difference]: With dead ends: 494 [2022-01-31 21:05:09,573 INFO L226 Difference]: Without dead ends: 487 [2022-01-31 21:05:09,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4428 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:05:09,574 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3640 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:09,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 206 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3640 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:05:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-01-31 21:05:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 476. [2022-01-31 21:05:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.4978632478632479) internal successors, (701), 470 states have internal predecessors, (701), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 708 transitions. [2022-01-31 21:05:09,696 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 708 transitions. Word has length 74 [2022-01-31 21:05:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:09,696 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 708 transitions. [2022-01-31 21:05:09,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:05:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 708 transitions. [2022-01-31 21:05:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:05:09,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:09,696 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:09,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 21:05:09,697 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:09,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:09,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1596041242, now seen corresponding path program 125 times [2022-01-31 21:05:09,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:09,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215346521] [2022-01-31 21:05:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:09,724 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:09,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:09,774 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:09,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:09,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:09,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:09,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:09,775 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:09,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:09,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:10,818 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:10,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215346521] [2022-01-31 21:05:10,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1215346521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:10,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:10,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:05:10,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400405244] [2022-01-31 21:05:10,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:10,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:05:10,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:10,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:05:10,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:05:10,820 INFO L87 Difference]: Start difference. First operand 476 states and 708 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:05:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:13,110 INFO L93 Difference]: Finished difference Result 496 states and 727 transitions. [2022-01-31 21:05:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:05:13,110 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 74 [2022-01-31 21:05:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:13,111 INFO L225 Difference]: With dead ends: 496 [2022-01-31 21:05:13,111 INFO L226 Difference]: Without dead ends: 489 [2022-01-31 21:05:13,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4952 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:05:13,112 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4037 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 4147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 4037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:13,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 213 Invalid, 4147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 4037 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:05:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-31 21:05:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 476. [2022-01-31 21:05:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.4957264957264957) internal successors, (700), 470 states have internal predecessors, (700), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 707 transitions. [2022-01-31 21:05:13,240 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 707 transitions. Word has length 74 [2022-01-31 21:05:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:13,240 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 707 transitions. [2022-01-31 21:05:13,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:05:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 707 transitions. [2022-01-31 21:05:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:05:13,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:13,241 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:13,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 21:05:13,241 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:13,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2030303582, now seen corresponding path program 126 times [2022-01-31 21:05:13,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:13,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442132837] [2022-01-31 21:05:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:13,268 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:13,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:13,318 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:13,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:13,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:13,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:13,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:13,319 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:13,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:13,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:14,439 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:14,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442132837] [2022-01-31 21:05:14,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1442132837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:14,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:14,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:05:14,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726935511] [2022-01-31 21:05:14,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:14,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:05:14,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:14,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:05:14,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:05:14,441 INFO L87 Difference]: Start difference. First operand 476 states and 707 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:05:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:16,971 INFO L93 Difference]: Finished difference Result 498 states and 728 transitions. [2022-01-31 21:05:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:05:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 74 [2022-01-31 21:05:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:16,973 INFO L225 Difference]: With dead ends: 498 [2022-01-31 21:05:16,973 INFO L226 Difference]: Without dead ends: 491 [2022-01-31 21:05:16,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:05:16,974 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 4572 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:16,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 225 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4572 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:05:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-31 21:05:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 476. [2022-01-31 21:05:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.4935897435897436) internal successors, (699), 470 states have internal predecessors, (699), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 706 transitions. [2022-01-31 21:05:17,100 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 706 transitions. Word has length 74 [2022-01-31 21:05:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:17,100 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 706 transitions. [2022-01-31 21:05:17,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:05:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 706 transitions. [2022-01-31 21:05:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:05:17,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:17,101 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:17,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 21:05:17,101 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2070884710, now seen corresponding path program 127 times [2022-01-31 21:05:17,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:17,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767106107] [2022-01-31 21:05:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:17,128 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:17,198 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:17,198 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:17,198 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:17,198 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:17,199 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:17,199 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:17,199 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:17,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:17,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:18,406 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767106107] [2022-01-31 21:05:18,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [767106107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:18,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:18,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:05:18,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354326102] [2022-01-31 21:05:18,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:18,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:05:18,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:18,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:05:18,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:05:18,408 INFO L87 Difference]: Start difference. First operand 476 states and 706 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:05:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:21,223 INFO L93 Difference]: Finished difference Result 499 states and 728 transitions. [2022-01-31 21:05:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:05:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 74 [2022-01-31 21:05:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:21,224 INFO L225 Difference]: With dead ends: 499 [2022-01-31 21:05:21,225 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 21:05:21,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6079 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:05:21,225 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 71 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5253 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 5375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 5253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:21,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 242 Invalid, 5375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 5253 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:05:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 21:05:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 476. [2022-01-31 21:05:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.4914529914529915) internal successors, (698), 470 states have internal predecessors, (698), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 705 transitions. [2022-01-31 21:05:21,346 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 705 transitions. Word has length 74 [2022-01-31 21:05:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:21,346 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 705 transitions. [2022-01-31 21:05:21,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:05:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 705 transitions. [2022-01-31 21:05:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:05:21,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:21,347 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:21,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 21:05:21,347 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -97149662, now seen corresponding path program 128 times [2022-01-31 21:05:21,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442004459] [2022-01-31 21:05:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:21,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:21,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:21,473 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:21,474 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:21,474 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:21,474 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:21,474 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:21,474 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:21,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:21,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:22,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:22,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442004459] [2022-01-31 21:05:22,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1442004459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:22,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:22,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:05:22,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343931150] [2022-01-31 21:05:22,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:22,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:05:22,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:05:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:05:22,782 INFO L87 Difference]: Start difference. First operand 476 states and 705 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:05:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:26,360 INFO L93 Difference]: Finished difference Result 599 states and 887 transitions. [2022-01-31 21:05:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:05:26,361 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 74 [2022-01-31 21:05:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:26,362 INFO L225 Difference]: With dead ends: 599 [2022-01-31 21:05:26,362 INFO L226 Difference]: Without dead ends: 572 [2022-01-31 21:05:26,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6704 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=598, Invalid=17492, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:05:26,363 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 77 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 7408 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 7599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 7408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:26,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 268 Invalid, 7599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 7408 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 21:05:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-31 21:05:26,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 536. [2022-01-31 21:05:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 528 states have (on average 1.509469696969697) internal successors, (797), 530 states have internal predecessors, (797), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 804 transitions. [2022-01-31 21:05:26,511 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 804 transitions. Word has length 74 [2022-01-31 21:05:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:26,511 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 804 transitions. [2022-01-31 21:05:26,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:05:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 804 transitions. [2022-01-31 21:05:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:05:26,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:26,511 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:26,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 21:05:26,511 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:26,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1677857700, now seen corresponding path program 129 times [2022-01-31 21:05:26,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:26,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372390155] [2022-01-31 21:05:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:26,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:26,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:26,601 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:26,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:26,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:26,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:26,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:26,601 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:26,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:26,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:27,955 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372390155] [2022-01-31 21:05:27,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [372390155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:27,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:27,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 21:05:27,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333422726] [2022-01-31 21:05:27,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:27,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 21:05:27,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:27,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 21:05:27,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:05:27,957 INFO L87 Difference]: Start difference. First operand 536 states and 804 transitions. Second operand has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 68 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 21:05:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:30,901 INFO L93 Difference]: Finished difference Result 566 states and 836 transitions. [2022-01-31 21:05:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 21:05:30,901 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:05:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:30,902 INFO L225 Difference]: With dead ends: 566 [2022-01-31 21:05:30,902 INFO L226 Difference]: Without dead ends: 558 [2022-01-31 21:05:30,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7090 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=616, Invalid=18566, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:05:30,903 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5132 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 5280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 5132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:30,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 220 Invalid, 5280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 5132 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:05:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-31 21:05:31,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 538. [2022-01-31 21:05:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 530 states have (on average 1.5075471698113208) internal successors, (799), 532 states have internal predecessors, (799), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 806 transitions. [2022-01-31 21:05:31,049 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 806 transitions. Word has length 74 [2022-01-31 21:05:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:31,049 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 806 transitions. [2022-01-31 21:05:31,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 68 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 21:05:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 806 transitions. [2022-01-31 21:05:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:31,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:31,050 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:31,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 21:05:31,050 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1060135322, now seen corresponding path program 130 times [2022-01-31 21:05:31,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:31,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747333558] [2022-01-31 21:05:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:31,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:31,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:31,152 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:31,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:31,152 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:31,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:31,152 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:31,152 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:31,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:31,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:31,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:31,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747333558] [2022-01-31 21:05:31,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1747333558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:31,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:31,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:05:31,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481094616] [2022-01-31 21:05:31,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:31,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:05:31,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:31,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:05:31,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:05:31,847 INFO L87 Difference]: Start difference. First operand 538 states and 806 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:05:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:33,004 INFO L93 Difference]: Finished difference Result 545 states and 812 transitions. [2022-01-31 21:05:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:05:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 77 [2022-01-31 21:05:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:33,005 INFO L225 Difference]: With dead ends: 545 [2022-01-31 21:05:33,005 INFO L226 Difference]: Without dead ends: 538 [2022-01-31 21:05:33,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=355, Invalid=6125, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:05:33,006 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:33,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 160 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:05:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-31 21:05:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 506. [2022-01-31 21:05:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5180722891566265) internal successors, (756), 500 states have internal predecessors, (756), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 763 transitions. [2022-01-31 21:05:33,143 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 763 transitions. Word has length 77 [2022-01-31 21:05:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:33,143 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 763 transitions. [2022-01-31 21:05:33,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 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 21:05:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 763 transitions. [2022-01-31 21:05:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:33,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:33,144 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:33,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 21:05:33,144 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash -331317154, now seen corresponding path program 131 times [2022-01-31 21:05:33,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:33,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140023596] [2022-01-31 21:05:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:33,172 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:33,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:33,221 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:33,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:33,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:33,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:33,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:33,222 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:33,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:33,261 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 21:05:34,007 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:34,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140023596] [2022-01-31 21:05:34,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140023596] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:34,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:34,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:05:34,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042097541] [2022-01-31 21:05:34,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:34,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:05:34,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:34,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:05:34,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:05:34,009 INFO L87 Difference]: Start difference. First operand 506 states and 763 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:05:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:35,207 INFO L93 Difference]: Finished difference Result 515 states and 771 transitions. [2022-01-31 21:05:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:05:35,207 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 77 [2022-01-31 21:05:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:35,208 INFO L225 Difference]: With dead ends: 515 [2022-01-31 21:05:35,208 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 21:05:35,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2696 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:05:35,209 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:35,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 137 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:05:35,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 21:05:35,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 506. [2022-01-31 21:05:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5160642570281124) internal successors, (755), 500 states have internal predecessors, (755), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 762 transitions. [2022-01-31 21:05:35,382 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 762 transitions. Word has length 77 [2022-01-31 21:05:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:35,382 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 762 transitions. [2022-01-31 21:05:35,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:05:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 762 transitions. [2022-01-31 21:05:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:35,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:35,383 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:35,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 21:05:35,383 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:35,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:35,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1018066970, now seen corresponding path program 132 times [2022-01-31 21:05:35,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:35,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414573356] [2022-01-31 21:05:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:35,420 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:35,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:35,487 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:35,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:35,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:35,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:35,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:35,488 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:35,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:35,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:35,540 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 21:05:36,356 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:36,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414573356] [2022-01-31 21:05:36,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [414573356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:36,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:36,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:05:36,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766789739] [2022-01-31 21:05:36,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:36,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:05:36,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:36,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:05:36,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:05:36,357 INFO L87 Difference]: Start difference. First operand 506 states and 762 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:05:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:37,786 INFO L93 Difference]: Finished difference Result 517 states and 772 transitions. [2022-01-31 21:05:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:05:37,786 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 77 [2022-01-31 21:05:37,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:37,787 INFO L225 Difference]: With dead ends: 517 [2022-01-31 21:05:37,787 INFO L226 Difference]: Without dead ends: 510 [2022-01-31 21:05:37,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:05:37,788 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:37,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 164 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:05:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-31 21:05:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 506. [2022-01-31 21:05:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5140562248995983) internal successors, (754), 500 states have internal predecessors, (754), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 761 transitions. [2022-01-31 21:05:37,988 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 761 transitions. Word has length 77 [2022-01-31 21:05:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:37,988 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 761 transitions. [2022-01-31 21:05:37,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:05:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 761 transitions. [2022-01-31 21:05:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:37,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:37,988 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:37,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 21:05:37,988 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2065827362, now seen corresponding path program 133 times [2022-01-31 21:05:37,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:37,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808485448] [2022-01-31 21:05:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:38,026 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:38,075 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:38,075 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:38,075 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:38,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:38,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:38,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:38,076 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:38,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:38,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:38,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:38,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808485448] [2022-01-31 21:05:38,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1808485448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:38,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:38,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:05:38,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614363473] [2022-01-31 21:05:38,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:38,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:05:38,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:05:38,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:05:38,950 INFO L87 Difference]: Start difference. First operand 506 states and 761 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:05:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:40,509 INFO L93 Difference]: Finished difference Result 519 states and 773 transitions. [2022-01-31 21:05:40,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:05:40,509 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 77 [2022-01-31 21:05:40,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:40,510 INFO L225 Difference]: With dead ends: 519 [2022-01-31 21:05:40,510 INFO L226 Difference]: Without dead ends: 512 [2022-01-31 21:05:40,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:05:40,511 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:40,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 161 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:05:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-31 21:05:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 506. [2022-01-31 21:05:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5120481927710843) internal successors, (753), 500 states have internal predecessors, (753), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 760 transitions. [2022-01-31 21:05:40,702 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 760 transitions. Word has length 77 [2022-01-31 21:05:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:40,702 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 760 transitions. [2022-01-31 21:05:40,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:05:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 760 transitions. [2022-01-31 21:05:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:40,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:40,702 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:40,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 21:05:40,702 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:40,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:40,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1579118234, now seen corresponding path program 134 times [2022-01-31 21:05:40,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:40,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704665676] [2022-01-31 21:05:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:40,730 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:40,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:40,795 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:40,796 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:40,796 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:40,796 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:40,796 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:40,796 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:40,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:40,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:41,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:41,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704665676] [2022-01-31 21:05:41,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1704665676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:41,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:41,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:05:41,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980406971] [2022-01-31 21:05:41,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:41,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:05:41,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:41,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:05:41,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:05:41,693 INFO L87 Difference]: Start difference. First operand 506 states and 760 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:05:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:43,601 INFO L93 Difference]: Finished difference Result 521 states and 774 transitions. [2022-01-31 21:05:43,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:05:43,601 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 77 [2022-01-31 21:05:43,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:43,602 INFO L225 Difference]: With dead ends: 521 [2022-01-31 21:05:43,602 INFO L226 Difference]: Without dead ends: 514 [2022-01-31 21:05:43,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3938 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:05:43,603 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3186 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:43,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 198 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3186 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:05:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-31 21:05:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 506. [2022-01-31 21:05:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5100401606425702) internal successors, (752), 500 states have internal predecessors, (752), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 759 transitions. [2022-01-31 21:05:43,738 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 759 transitions. Word has length 77 [2022-01-31 21:05:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:43,738 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 759 transitions. [2022-01-31 21:05:43,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:05:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 759 transitions. [2022-01-31 21:05:43,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:43,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:43,738 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:43,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 21:05:43,738 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:43,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1500812126, now seen corresponding path program 135 times [2022-01-31 21:05:43,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:43,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123131160] [2022-01-31 21:05:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:43,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:43,836 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:43,837 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:43,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:43,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:43,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:43,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:43,837 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:43,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:43,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:43,871 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 21:05:44,810 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:44,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123131160] [2022-01-31 21:05:44,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2123131160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:44,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:44,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:05:44,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771654620] [2022-01-31 21:05:44,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:44,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:05:44,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:44,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:05:44,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:05:44,811 INFO L87 Difference]: Start difference. First operand 506 states and 759 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:05:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:46,789 INFO L93 Difference]: Finished difference Result 523 states and 775 transitions. [2022-01-31 21:05:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:05:46,789 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 77 [2022-01-31 21:05:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:46,790 INFO L225 Difference]: With dead ends: 523 [2022-01-31 21:05:46,790 INFO L226 Difference]: Without dead ends: 516 [2022-01-31 21:05:46,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4474 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:05:46,791 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3279 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:46,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 190 Invalid, 3383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3279 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:05:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-31 21:05:46,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 506. [2022-01-31 21:05:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5080321285140563) internal successors, (751), 500 states have internal predecessors, (751), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 758 transitions. [2022-01-31 21:05:46,931 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 758 transitions. Word has length 77 [2022-01-31 21:05:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:46,932 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 758 transitions. [2022-01-31 21:05:46,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:05:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 758 transitions. [2022-01-31 21:05:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:46,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:46,932 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:46,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 21:05:46,932 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:46,932 INFO L85 PathProgramCache]: Analyzing trace with hash -886356710, now seen corresponding path program 136 times [2022-01-31 21:05:46,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:46,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616758839] [2022-01-31 21:05:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:46,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:47,019 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:47,019 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:47,019 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:47,019 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:47,019 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:47,019 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:47,019 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:47,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:47,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:48,059 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:48,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616758839] [2022-01-31 21:05:48,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616758839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:48,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:48,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:05:48,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186727605] [2022-01-31 21:05:48,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:48,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:05:48,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:05:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:05:48,060 INFO L87 Difference]: Start difference. First operand 506 states and 758 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:05:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:50,256 INFO L93 Difference]: Finished difference Result 525 states and 776 transitions. [2022-01-31 21:05:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:05:50,257 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 77 [2022-01-31 21:05:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:50,258 INFO L225 Difference]: With dead ends: 525 [2022-01-31 21:05:50,258 INFO L226 Difference]: Without dead ends: 518 [2022-01-31 21:05:50,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4947 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:05:50,258 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 3866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:50,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 202 Invalid, 3866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:05:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-31 21:05:50,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 506. [2022-01-31 21:05:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5060240963855422) internal successors, (750), 500 states have internal predecessors, (750), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 757 transitions. [2022-01-31 21:05:50,400 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 757 transitions. Word has length 77 [2022-01-31 21:05:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:50,400 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 757 transitions. [2022-01-31 21:05:50,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:05:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 757 transitions. [2022-01-31 21:05:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:50,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:50,401 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:50,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 21:05:50,401 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:50,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1554232098, now seen corresponding path program 137 times [2022-01-31 21:05:50,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:50,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148832343] [2022-01-31 21:05:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:50,438 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:50,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:50,488 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:50,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:50,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:50,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:50,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:50,488 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:50,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:50,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:51,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:51,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148832343] [2022-01-31 21:05:51,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1148832343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:51,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:51,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:05:51,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622395419] [2022-01-31 21:05:51,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:51,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:05:51,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:51,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:05:51,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:05:51,590 INFO L87 Difference]: Start difference. First operand 506 states and 757 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:05:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:54,206 INFO L93 Difference]: Finished difference Result 527 states and 777 transitions. [2022-01-31 21:05:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:05:54,207 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 77 [2022-01-31 21:05:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:54,207 INFO L225 Difference]: With dead ends: 527 [2022-01-31 21:05:54,207 INFO L226 Difference]: Without dead ends: 520 [2022-01-31 21:05:54,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5490 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:05:54,208 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 4945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:54,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 239 Invalid, 4945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:05:54,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-31 21:05:54,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 506. [2022-01-31 21:05:54,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5040160642570282) internal successors, (749), 500 states have internal predecessors, (749), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 756 transitions. [2022-01-31 21:05:54,391 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 756 transitions. Word has length 77 [2022-01-31 21:05:54,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:54,391 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 756 transitions. [2022-01-31 21:05:54,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:05:54,391 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 756 transitions. [2022-01-31 21:05:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:54,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:54,392 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:54,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 21:05:54,392 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:54,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1988494438, now seen corresponding path program 138 times [2022-01-31 21:05:54,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:54,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897392250] [2022-01-31 21:05:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:54,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:54,496 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:54,496 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:54,496 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:54,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:54,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:54,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:54,497 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:54,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:54,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:55,703 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:55,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897392250] [2022-01-31 21:05:55,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [897392250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:55,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:55,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:05:55,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224343929] [2022-01-31 21:05:55,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:55,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:05:55,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:55,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:05:55,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:05:55,705 INFO L87 Difference]: Start difference. First operand 506 states and 756 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:05:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:58,472 INFO L93 Difference]: Finished difference Result 529 states and 778 transitions. [2022-01-31 21:05:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:05:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 77 [2022-01-31 21:05:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:58,474 INFO L225 Difference]: With dead ends: 529 [2022-01-31 21:05:58,474 INFO L226 Difference]: Without dead ends: 522 [2022-01-31 21:05:58,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5979 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=571, Invalid=15941, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:05:58,475 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 74 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4930 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 5053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:58,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 231 Invalid, 5053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4930 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:05:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-31 21:05:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 506. [2022-01-31 21:05:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.502008032128514) internal successors, (748), 500 states have internal predecessors, (748), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:05:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 755 transitions. [2022-01-31 21:05:58,616 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 755 transitions. Word has length 77 [2022-01-31 21:05:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:58,616 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 755 transitions. [2022-01-31 21:05:58,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:05:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 755 transitions. [2022-01-31 21:05:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:05:58,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:58,617 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:58,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 21:05:58,617 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:58,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2112693854, now seen corresponding path program 139 times [2022-01-31 21:05:58,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:58,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45010350] [2022-01-31 21:05:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:58,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:58,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:58,695 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:58,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:58,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:58,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:05:58,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:05:58,695 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:58,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:58,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:59,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:59,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45010350] [2022-01-31 21:05:59,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [45010350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:59,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:59,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:05:59,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002365349] [2022-01-31 21:05:59,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:59,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:05:59,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:59,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:05:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:05:59,997 INFO L87 Difference]: Start difference. First operand 506 states and 755 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:06:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:03,153 INFO L93 Difference]: Finished difference Result 530 states and 778 transitions. [2022-01-31 21:06:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:06:03,153 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 77 [2022-01-31 21:06:03,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:03,155 INFO L225 Difference]: With dead ends: 530 [2022-01-31 21:06:03,155 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 21:06:03,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=600, Invalid=17490, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:06:03,156 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 6147 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 6275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 6147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:03,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 268 Invalid, 6275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 6147 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 21:06:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 21:06:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 506. [2022-01-31 21:06:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5) internal successors, (747), 500 states have internal predecessors, (747), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 754 transitions. [2022-01-31 21:06:03,372 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 754 transitions. Word has length 77 [2022-01-31 21:06:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:03,372 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 754 transitions. [2022-01-31 21:06:03,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:06:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 754 transitions. [2022-01-31 21:06:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:06:03,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:03,373 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:03,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 21:06:03,373 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash -55340518, now seen corresponding path program 140 times [2022-01-31 21:06:03,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:03,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6278012] [2022-01-31 21:06:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:03,415 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:03,476 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:03,477 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:03,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:03,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:03,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:03,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:03,477 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:03,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:03,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:04,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:04,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6278012] [2022-01-31 21:06:04,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [6278012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:04,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:04,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:06:04,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646459187] [2022-01-31 21:06:04,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:04,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:06:04,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:06:04,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:06:04,880 INFO L87 Difference]: Start difference. First operand 506 states and 754 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:06:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:08,642 INFO L93 Difference]: Finished difference Result 635 states and 945 transitions. [2022-01-31 21:06:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:06:08,643 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 77 [2022-01-31 21:06:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:08,644 INFO L225 Difference]: With dead ends: 635 [2022-01-31 21:06:08,644 INFO L226 Difference]: Without dead ends: 607 [2022-01-31 21:06:08,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7353 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=625, Invalid=19115, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 21:06:08,646 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 81 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7586 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 7786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 7586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:08,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 265 Invalid, 7786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 7586 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 21:06:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-31 21:06:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 569. [2022-01-31 21:06:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 561 states have (on average 1.516934046345811) internal successors, (851), 563 states have internal predecessors, (851), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 858 transitions. [2022-01-31 21:06:08,814 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 858 transitions. Word has length 77 [2022-01-31 21:06:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:08,815 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 858 transitions. [2022-01-31 21:06:08,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:06:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 858 transitions. [2022-01-31 21:06:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:06:08,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:08,815 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:08,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 21:06:08,815 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:08,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1719666844, now seen corresponding path program 141 times [2022-01-31 21:06:08,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:08,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492835602] [2022-01-31 21:06:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:08,874 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:08,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:08,938 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:08,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:08,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:08,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:08,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:08,938 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:08,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:08,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:08,980 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 21:06:10,371 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:10,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492835602] [2022-01-31 21:06:10,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492835602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:10,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:10,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:06:10,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454101703] [2022-01-31 21:06:10,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:10,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:06:10,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:10,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:06:10,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=5185, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:06:10,372 INFO L87 Difference]: Start difference. First operand 569 states and 858 transitions. Second operand has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 71 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 21:06:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:13,780 INFO L93 Difference]: Finished difference Result 600 states and 891 transitions. [2022-01-31 21:06:13,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:06:13,780 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 71 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 77 [2022-01-31 21:06:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:13,781 INFO L225 Difference]: With dead ends: 600 [2022-01-31 21:06:13,781 INFO L226 Difference]: Without dead ends: 592 [2022-01-31 21:06:13,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7881 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=645, Invalid=20235, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 21:06:13,782 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 94 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 6352 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 6506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 6352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:13,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 256 Invalid, 6506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 6352 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:06:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-31 21:06:13,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 571. [2022-01-31 21:06:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5150976909413854) internal successors, (853), 565 states have internal predecessors, (853), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 860 transitions. [2022-01-31 21:06:13,947 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 860 transitions. Word has length 77 [2022-01-31 21:06:13,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:13,947 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 860 transitions. [2022-01-31 21:06:13,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 71 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 21:06:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 860 transitions. [2022-01-31 21:06:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:13,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:13,948 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:13,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 21:06:13,948 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1055828386, now seen corresponding path program 142 times [2022-01-31 21:06:13,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:13,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855267799] [2022-01-31 21:06:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:13,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:14,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:14,043 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:14,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:14,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:14,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:14,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:14,044 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:14,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:14,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:14,095 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 21:06:14,812 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:14,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855267799] [2022-01-31 21:06:14,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855267799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:14,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:14,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:06:14,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943322059] [2022-01-31 21:06:14,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:14,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:06:14,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:14,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:06:14,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:06:14,813 INFO L87 Difference]: Start difference. First operand 571 states and 860 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:06:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:16,074 INFO L93 Difference]: Finished difference Result 579 states and 867 transitions. [2022-01-31 21:06:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:06:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 80 [2022-01-31 21:06:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:16,075 INFO L225 Difference]: With dead ends: 579 [2022-01-31 21:06:16,075 INFO L226 Difference]: Without dead ends: 572 [2022-01-31 21:06:16,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:06:16,076 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:16,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 151 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:06:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-31 21:06:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 571. [2022-01-31 21:06:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5133214920071048) internal successors, (852), 565 states have internal predecessors, (852), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 859 transitions. [2022-01-31 21:06:16,274 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 859 transitions. Word has length 80 [2022-01-31 21:06:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:16,274 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 859 transitions. [2022-01-31 21:06:16,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:06:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 859 transitions. [2022-01-31 21:06:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:16,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:16,274 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:16,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 21:06:16,275 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:16,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:16,275 INFO L85 PathProgramCache]: Analyzing trace with hash -335624090, now seen corresponding path program 143 times [2022-01-31 21:06:16,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:16,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671400505] [2022-01-31 21:06:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:16,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:16,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:16,370 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:16,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:16,370 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:16,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:16,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:16,371 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:16,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:16,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:17,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:17,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671400505] [2022-01-31 21:06:17,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671400505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:17,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:17,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:06:17,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362670854] [2022-01-31 21:06:17,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:17,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:06:17,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:17,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:06:17,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:06:17,171 INFO L87 Difference]: Start difference. First operand 571 states and 859 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:06:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:18,530 INFO L93 Difference]: Finished difference Result 581 states and 868 transitions. [2022-01-31 21:06:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:06:18,530 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 80 [2022-01-31 21:06:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:18,531 INFO L225 Difference]: With dead ends: 581 [2022-01-31 21:06:18,531 INFO L226 Difference]: Without dead ends: 574 [2022-01-31 21:06:18,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3074 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:06:18,532 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:18,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 148 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:06:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-31 21:06:18,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 571. [2022-01-31 21:06:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5115452930728241) internal successors, (851), 565 states have internal predecessors, (851), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 858 transitions. [2022-01-31 21:06:18,695 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 858 transitions. Word has length 80 [2022-01-31 21:06:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:18,695 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 858 transitions. [2022-01-31 21:06:18,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:06:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 858 transitions. [2022-01-31 21:06:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:18,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:18,696 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:18,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 21:06:18,696 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1013760034, now seen corresponding path program 144 times [2022-01-31 21:06:18,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:18,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634722329] [2022-01-31 21:06:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:18,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:18,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:18,773 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:18,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:18,773 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:18,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:18,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:18,774 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:18,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:18,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:19,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:19,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634722329] [2022-01-31 21:06:19,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [634722329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:19,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:19,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:06:19,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132704518] [2022-01-31 21:06:19,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:19,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:06:19,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:06:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:06:19,663 INFO L87 Difference]: Start difference. First operand 571 states and 858 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:06:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:21,252 INFO L93 Difference]: Finished difference Result 583 states and 869 transitions. [2022-01-31 21:06:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:06:21,252 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 80 [2022-01-31 21:06:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:21,253 INFO L225 Difference]: With dead ends: 583 [2022-01-31 21:06:21,253 INFO L226 Difference]: Without dead ends: 576 [2022-01-31 21:06:21,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3473 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:06:21,253 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:21,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 165 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:06:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-31 21:06:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 571. [2022-01-31 21:06:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5097690941385435) internal successors, (850), 565 states have internal predecessors, (850), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 857 transitions. [2022-01-31 21:06:21,416 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 857 transitions. Word has length 80 [2022-01-31 21:06:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:21,416 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 857 transitions. [2022-01-31 21:06:21,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:06:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 857 transitions. [2022-01-31 21:06:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:21,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:21,416 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:21,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 21:06:21,416 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2070134298, now seen corresponding path program 145 times [2022-01-31 21:06:21,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:21,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199999449] [2022-01-31 21:06:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:21,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:21,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:21,493 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:21,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:21,493 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:21,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:21,493 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:21,493 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:21,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:21,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:22,398 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:22,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199999449] [2022-01-31 21:06:22,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [199999449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:22,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:22,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:06:22,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050776659] [2022-01-31 21:06:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:22,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:06:22,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:06:22,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:06:22,400 INFO L87 Difference]: Start difference. First operand 571 states and 857 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:06:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:24,269 INFO L93 Difference]: Finished difference Result 585 states and 870 transitions. [2022-01-31 21:06:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:06:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 80 [2022-01-31 21:06:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:24,271 INFO L225 Difference]: With dead ends: 585 [2022-01-31 21:06:24,271 INFO L226 Difference]: Without dead ends: 578 [2022-01-31 21:06:24,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3966 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:06:24,272 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3110 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:24,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 197 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3110 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:06:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-31 21:06:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 571. [2022-01-31 21:06:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.507992895204263) internal successors, (849), 565 states have internal predecessors, (849), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 856 transitions. [2022-01-31 21:06:24,515 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 856 transitions. Word has length 80 [2022-01-31 21:06:24,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:24,515 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 856 transitions. [2022-01-31 21:06:24,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:06:24,515 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 856 transitions. [2022-01-31 21:06:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:24,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:24,515 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:24,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 21:06:24,516 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:24,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:24,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1574811298, now seen corresponding path program 146 times [2022-01-31 21:06:24,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:24,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978768868] [2022-01-31 21:06:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:24,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:24,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:24,621 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:24,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:24,621 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:24,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:24,621 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:24,621 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:24,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:24,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:25,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:25,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978768868] [2022-01-31 21:06:25,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1978768868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:25,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:25,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:06:25,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832448114] [2022-01-31 21:06:25,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:25,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:06:25,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:25,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:06:25,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:06:25,620 INFO L87 Difference]: Start difference. First operand 571 states and 856 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:06:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:27,590 INFO L93 Difference]: Finished difference Result 587 states and 871 transitions. [2022-01-31 21:06:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:06:27,591 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 80 [2022-01-31 21:06:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:27,592 INFO L225 Difference]: With dead ends: 587 [2022-01-31 21:06:27,592 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 21:06:27,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4467 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:06:27,593 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3218 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:27,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 189 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3218 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:06:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 21:06:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 571. [2022-01-31 21:06:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5062166962699823) internal successors, (848), 565 states have internal predecessors, (848), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 855 transitions. [2022-01-31 21:06:27,756 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 855 transitions. Word has length 80 [2022-01-31 21:06:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:27,757 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 855 transitions. [2022-01-31 21:06:27,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:06:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 855 transitions. [2022-01-31 21:06:27,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:27,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:27,757 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:27,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 21:06:27,757 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:27,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1496505190, now seen corresponding path program 147 times [2022-01-31 21:06:27,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:27,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385532112] [2022-01-31 21:06:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:27,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:27,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:27,837 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:27,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:27,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:27,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:27,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:27,838 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:27,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:27,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:28,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385532112] [2022-01-31 21:06:28,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1385532112] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:28,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:06:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603499484] [2022-01-31 21:06:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:06:28,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:06:28,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:06:28,911 INFO L87 Difference]: Start difference. First operand 571 states and 855 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:06:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:31,391 INFO L93 Difference]: Finished difference Result 589 states and 872 transitions. [2022-01-31 21:06:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:06:31,392 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 80 [2022-01-31 21:06:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:31,392 INFO L225 Difference]: With dead ends: 589 [2022-01-31 21:06:31,393 INFO L226 Difference]: Without dead ends: 582 [2022-01-31 21:06:31,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4880 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=517, Invalid=13055, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:06:31,393 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4602 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 4712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 4602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:31,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 246 Invalid, 4712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 4602 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:06:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-31 21:06:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 571. [2022-01-31 21:06:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5044404973357015) internal successors, (847), 565 states have internal predecessors, (847), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 854 transitions. [2022-01-31 21:06:31,557 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 854 transitions. Word has length 80 [2022-01-31 21:06:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:31,557 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 854 transitions. [2022-01-31 21:06:31,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:06:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 854 transitions. [2022-01-31 21:06:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:31,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:31,558 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:31,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-01-31 21:06:31,558 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:31,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:31,558 INFO L85 PathProgramCache]: Analyzing trace with hash -890663646, now seen corresponding path program 148 times [2022-01-31 21:06:31,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:31,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363600390] [2022-01-31 21:06:31,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:31,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:31,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:31,649 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:31,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:31,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:31,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:31,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:31,649 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:31,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:31,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:32,777 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:32,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363600390] [2022-01-31 21:06:32,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363600390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:32,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:32,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:06:32,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500133221] [2022-01-31 21:06:32,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:32,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:06:32,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:06:32,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:06:32,778 INFO L87 Difference]: Start difference. First operand 571 states and 854 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:06:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:35,244 INFO L93 Difference]: Finished difference Result 591 states and 873 transitions. [2022-01-31 21:06:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:06:35,244 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 80 [2022-01-31 21:06:35,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:35,245 INFO L225 Difference]: With dead ends: 591 [2022-01-31 21:06:35,245 INFO L226 Difference]: Without dead ends: 584 [2022-01-31 21:06:35,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5524 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:06:35,246 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4303 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 4419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:35,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 218 Invalid, 4419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4303 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:06:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-31 21:06:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 571. [2022-01-31 21:06:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.502664298401421) internal successors, (846), 565 states have internal predecessors, (846), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 853 transitions. [2022-01-31 21:06:35,410 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 853 transitions. Word has length 80 [2022-01-31 21:06:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:35,410 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 853 transitions. [2022-01-31 21:06:35,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:06:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 853 transitions. [2022-01-31 21:06:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:35,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:35,411 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:35,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-01-31 21:06:35,411 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1558539034, now seen corresponding path program 149 times [2022-01-31 21:06:35,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:35,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104866277] [2022-01-31 21:06:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:35,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:35,522 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:35,522 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:35,522 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:35,522 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:35,522 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:35,523 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:35,523 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:35,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:35,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:36,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104866277] [2022-01-31 21:06:36,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [104866277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:36,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:36,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:06:36,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109271609] [2022-01-31 21:06:36,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:36,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:06:36,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:06:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:06:36,766 INFO L87 Difference]: Start difference. First operand 571 states and 853 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:06:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:39,543 INFO L93 Difference]: Finished difference Result 593 states and 874 transitions. [2022-01-31 21:06:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:06:39,544 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 80 [2022-01-31 21:06:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:39,544 INFO L225 Difference]: With dead ends: 593 [2022-01-31 21:06:39,544 INFO L226 Difference]: Without dead ends: 586 [2022-01-31 21:06:39,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6089 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:06:39,545 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5087 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 5209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 5087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:39,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 240 Invalid, 5209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 5087 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:06:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-31 21:06:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 571. [2022-01-31 21:06:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5008880994671403) internal successors, (845), 565 states have internal predecessors, (845), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 852 transitions. [2022-01-31 21:06:39,711 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 852 transitions. Word has length 80 [2022-01-31 21:06:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:39,711 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 852 transitions. [2022-01-31 21:06:39,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:06:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 852 transitions. [2022-01-31 21:06:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:39,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:39,711 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:39,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-01-31 21:06:39,712 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1992801374, now seen corresponding path program 150 times [2022-01-31 21:06:39,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:39,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697650368] [2022-01-31 21:06:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:39,748 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:39,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:39,818 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:39,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:39,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:39,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:39,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:39,818 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:39,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:39,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:41,160 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:41,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697650368] [2022-01-31 21:06:41,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [697650368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:41,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:41,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:06:41,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923822357] [2022-01-31 21:06:41,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:41,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:06:41,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:41,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:06:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:06:41,161 INFO L87 Difference]: Start difference. First operand 571 states and 852 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:06:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:44,006 INFO L93 Difference]: Finished difference Result 595 states and 875 transitions. [2022-01-31 21:06:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:06:44,006 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 80 [2022-01-31 21:06:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:44,007 INFO L225 Difference]: With dead ends: 595 [2022-01-31 21:06:44,007 INFO L226 Difference]: Without dead ends: 588 [2022-01-31 21:06:44,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6592 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=598, Invalid=17492, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:06:44,008 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 75 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4923 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 5051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:44,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 222 Invalid, 5051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4923 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:06:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-31 21:06:44,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 571. [2022-01-31 21:06:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.4991119005328597) internal successors, (844), 565 states have internal predecessors, (844), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 851 transitions. [2022-01-31 21:06:44,174 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 851 transitions. Word has length 80 [2022-01-31 21:06:44,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:44,174 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 851 transitions. [2022-01-31 21:06:44,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:06:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 851 transitions. [2022-01-31 21:06:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:44,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:44,175 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:44,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-01-31 21:06:44,175 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:44,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2108386918, now seen corresponding path program 151 times [2022-01-31 21:06:44,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:44,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776691560] [2022-01-31 21:06:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:44,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:44,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:44,270 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:44,270 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:44,270 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:44,270 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:44,270 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:44,270 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:44,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:44,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:45,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:45,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776691560] [2022-01-31 21:06:45,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1776691560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:45,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:45,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:06:45,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411590233] [2022-01-31 21:06:45,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:45,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:06:45,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:06:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:06:45,655 INFO L87 Difference]: Start difference. First operand 571 states and 851 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:06:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:48,734 INFO L93 Difference]: Finished difference Result 596 states and 875 transitions. [2022-01-31 21:06:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:06:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 80 [2022-01-31 21:06:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:48,735 INFO L225 Difference]: With dead ends: 596 [2022-01-31 21:06:48,735 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 21:06:48,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7347 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 21:06:48,736 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 78 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 5501 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 5635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 5501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:48,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 234 Invalid, 5635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 5501 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:06:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 21:06:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 571. [2022-01-31 21:06:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.497335701598579) internal successors, (843), 565 states have internal predecessors, (843), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 850 transitions. [2022-01-31 21:06:48,900 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 850 transitions. Word has length 80 [2022-01-31 21:06:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:48,900 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 850 transitions. [2022-01-31 21:06:48,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:06:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 850 transitions. [2022-01-31 21:06:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:48,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:48,901 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:48,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-01-31 21:06:48,901 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:48,901 INFO L85 PathProgramCache]: Analyzing trace with hash -59647454, now seen corresponding path program 152 times [2022-01-31 21:06:48,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:48,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175483456] [2022-01-31 21:06:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:48,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:48,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:48,996 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:48,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:48,996 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:48,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:48,996 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:48,996 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:48,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:49,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:50,482 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:50,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175483456] [2022-01-31 21:06:50,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1175483456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:50,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:50,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:06:50,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184598021] [2022-01-31 21:06:50,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:50,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:06:50,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:50,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:06:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:06:50,484 INFO L87 Difference]: Start difference. First operand 571 states and 850 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:06:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:54,576 INFO L93 Difference]: Finished difference Result 706 states and 1050 transitions. [2022-01-31 21:06:54,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:06:54,577 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 80 [2022-01-31 21:06:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:54,578 INFO L225 Difference]: With dead ends: 706 [2022-01-31 21:06:54,578 INFO L226 Difference]: Without dead ends: 677 [2022-01-31 21:06:54,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8032 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=652, Invalid=20810, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:06:54,579 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 84 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 8288 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 8497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 8288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:54,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 277 Invalid, 8497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 8288 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 21:06:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-31 21:06:54,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 637. [2022-01-31 21:06:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 629 states have (on average 1.5135135135135136) internal successors, (952), 631 states have internal predecessors, (952), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:06:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 959 transitions. [2022-01-31 21:06:54,770 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 959 transitions. Word has length 80 [2022-01-31 21:06:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:54,770 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 959 transitions. [2022-01-31 21:06:54,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:06:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 959 transitions. [2022-01-31 21:06:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:06:54,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:54,771 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:54,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-01-31 21:06:54,771 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1715359908, now seen corresponding path program 153 times [2022-01-31 21:06:54,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:54,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506323493] [2022-01-31 21:06:54,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:54,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:54,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:54,871 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:54,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:54,871 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:54,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:06:54,871 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:06:54,871 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:54,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:54,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:56,398 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:56,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506323493] [2022-01-31 21:06:56,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506323493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:56,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:56,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 21:06:56,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760935777] [2022-01-31 21:06:56,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:56,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 21:06:56,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:56,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 21:06:56,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=5626, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:06:56,400 INFO L87 Difference]: Start difference. First operand 637 states and 959 transitions. Second operand has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 74 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 21:07:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:00,075 INFO L93 Difference]: Finished difference Result 669 states and 993 transitions. [2022-01-31 21:07:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 21:07:00,075 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:07:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:00,076 INFO L225 Difference]: With dead ends: 669 [2022-01-31 21:07:00,076 INFO L226 Difference]: Without dead ends: 661 [2022-01-31 21:07:00,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8584 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=672, Invalid=21978, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:07:00,077 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 6625 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 6784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 6625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:00,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 257 Invalid, 6784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 6625 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:07:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-31 21:07:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 639. [2022-01-31 21:07:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 631 states have (on average 1.5118858954041206) internal successors, (954), 633 states have internal predecessors, (954), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 961 transitions. [2022-01-31 21:07:00,267 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 961 transitions. Word has length 80 [2022-01-31 21:07:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:00,267 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 961 transitions. [2022-01-31 21:07:00,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 74 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 21:07:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 961 transitions. [2022-01-31 21:07:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:00,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:00,268 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:00,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-01-31 21:07:00,268 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:00,268 INFO L85 PathProgramCache]: Analyzing trace with hash -666711586, now seen corresponding path program 154 times [2022-01-31 21:07:00,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:00,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59967812] [2022-01-31 21:07:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:00,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:00,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:00,373 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:00,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:00,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:00,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:00,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:00,374 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:00,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:00,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:01,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:01,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59967812] [2022-01-31 21:07:01,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [59967812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:01,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:01,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:07:01,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853925092] [2022-01-31 21:07:01,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:01,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:07:01,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:01,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:07:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:07:01,111 INFO L87 Difference]: Start difference. First operand 639 states and 961 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:07:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:02,319 INFO L93 Difference]: Finished difference Result 646 states and 967 transitions. [2022-01-31 21:07:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:07:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 83 [2022-01-31 21:07:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:02,320 INFO L225 Difference]: With dead ends: 646 [2022-01-31 21:07:02,320 INFO L226 Difference]: Without dead ends: 639 [2022-01-31 21:07:02,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:07:02,321 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:02,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 140 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:07:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-31 21:07:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 604. [2022-01-31 21:07:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5218120805369129) internal successors, (907), 598 states have internal predecessors, (907), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 914 transitions. [2022-01-31 21:07:02,513 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 914 transitions. Word has length 83 [2022-01-31 21:07:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:02,513 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 914 transitions. [2022-01-31 21:07:02,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 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 21:07:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 914 transitions. [2022-01-31 21:07:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:02,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:02,514 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:02,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-01-31 21:07:02,514 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1596916890, now seen corresponding path program 155 times [2022-01-31 21:07:02,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:02,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929667344] [2022-01-31 21:07:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:02,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:02,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:02,622 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:02,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:02,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:02,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:02,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:02,622 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:02,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:02,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:03,449 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:03,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929667344] [2022-01-31 21:07:03,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929667344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:03,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:03,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:07:03,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279341265] [2022-01-31 21:07:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:03,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:07:03,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:07:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:07:03,450 INFO L87 Difference]: Start difference. First operand 604 states and 914 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:07:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:04,840 INFO L93 Difference]: Finished difference Result 613 states and 922 transitions. [2022-01-31 21:07:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:07:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 83 [2022-01-31 21:07:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:04,841 INFO L225 Difference]: With dead ends: 613 [2022-01-31 21:07:04,841 INFO L226 Difference]: Without dead ends: 606 [2022-01-31 21:07:04,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3111 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:07:04,841 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:04,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 152 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:07:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-01-31 21:07:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 604. [2022-01-31 21:07:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5201342281879195) internal successors, (906), 598 states have internal predecessors, (906), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 913 transitions. [2022-01-31 21:07:05,021 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 913 transitions. Word has length 83 [2022-01-31 21:07:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:05,021 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 913 transitions. [2022-01-31 21:07:05,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:07:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 913 transitions. [2022-01-31 21:07:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:05,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:05,021 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:05,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-01-31 21:07:05,021 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:05,022 INFO L85 PathProgramCache]: Analyzing trace with hash 205464414, now seen corresponding path program 156 times [2022-01-31 21:07:05,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:05,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881749476] [2022-01-31 21:07:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:05,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:05,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:05,101 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:05,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:05,101 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:05,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:05,101 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:05,101 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:05,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:05,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:05,980 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:05,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881749476] [2022-01-31 21:07:05,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [881749476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:05,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:05,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:07:05,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018146288] [2022-01-31 21:07:05,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:05,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:07:05,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:05,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:07:05,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:07:05,981 INFO L87 Difference]: Start difference. First operand 604 states and 913 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:07:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:07,560 INFO L93 Difference]: Finished difference Result 615 states and 923 transitions. [2022-01-31 21:07:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:07:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 83 [2022-01-31 21:07:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:07,561 INFO L225 Difference]: With dead ends: 615 [2022-01-31 21:07:07,561 INFO L226 Difference]: Without dead ends: 608 [2022-01-31 21:07:07,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3445 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:07:07,562 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:07,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 159 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2224 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:07:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-31 21:07:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 604. [2022-01-31 21:07:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5184563758389262) internal successors, (905), 598 states have internal predecessors, (905), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 912 transitions. [2022-01-31 21:07:07,744 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 912 transitions. Word has length 83 [2022-01-31 21:07:07,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:07,744 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 912 transitions. [2022-01-31 21:07:07,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:07:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 912 transitions. [2022-01-31 21:07:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:07,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:07,745 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:07,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-01-31 21:07:07,745 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:07,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:07,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1554848538, now seen corresponding path program 157 times [2022-01-31 21:07:07,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:07,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353558657] [2022-01-31 21:07:07,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:07,772 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:07,844 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:07,844 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:07,844 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:07,844 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:07,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:07,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:07,845 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:07,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:07,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:07,882 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 21:07:08,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:08,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353558657] [2022-01-31 21:07:08,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [353558657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:08,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:08,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:07:08,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054137187] [2022-01-31 21:07:08,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:08,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:07:08,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:07:08,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:07:08,794 INFO L87 Difference]: Start difference. First operand 604 states and 912 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:07:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:10,682 INFO L93 Difference]: Finished difference Result 617 states and 924 transitions. [2022-01-31 21:07:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:07:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 83 [2022-01-31 21:07:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:10,683 INFO L225 Difference]: With dead ends: 617 [2022-01-31 21:07:10,683 INFO L226 Difference]: Without dead ends: 610 [2022-01-31 21:07:10,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:07:10,684 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3045 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:10,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 196 Invalid, 3144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3045 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:07:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-31 21:07:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 604. [2022-01-31 21:07:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.516778523489933) internal successors, (904), 598 states have internal predecessors, (904), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 911 transitions. [2022-01-31 21:07:10,864 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 911 transitions. Word has length 83 [2022-01-31 21:07:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:10,864 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 911 transitions. [2022-01-31 21:07:10,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:07:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 911 transitions. [2022-01-31 21:07:10,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:10,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:10,865 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:10,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-01-31 21:07:10,865 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1529045794, now seen corresponding path program 158 times [2022-01-31 21:07:10,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:10,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429479564] [2022-01-31 21:07:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:10,902 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:10,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:10,969 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:10,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:10,969 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:10,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:10,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:10,970 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:10,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:11,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:11,016 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 21:07:11,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:11,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429479564] [2022-01-31 21:07:11,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [429479564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:11,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:11,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:07:11,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212232989] [2022-01-31 21:07:11,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:11,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:07:11,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:11,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:07:11,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:07:11,949 INFO L87 Difference]: Start difference. First operand 604 states and 911 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:07:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:14,115 INFO L93 Difference]: Finished difference Result 619 states and 925 transitions. [2022-01-31 21:07:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:07:14,115 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 83 [2022-01-31 21:07:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:14,116 INFO L225 Difference]: With dead ends: 619 [2022-01-31 21:07:14,116 INFO L226 Difference]: Without dead ends: 612 [2022-01-31 21:07:14,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4345 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=490, Invalid=11720, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:07:14,116 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3699 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 3804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:14,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 3804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3699 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:07:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-31 21:07:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 604. [2022-01-31 21:07:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5151006711409396) internal successors, (903), 598 states have internal predecessors, (903), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 910 transitions. [2022-01-31 21:07:14,299 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 910 transitions. Word has length 83 [2022-01-31 21:07:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:14,299 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 910 transitions. [2022-01-31 21:07:14,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:07:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 910 transitions. [2022-01-31 21:07:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:14,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:14,299 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:14,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-01-31 21:07:14,299 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2115899802, now seen corresponding path program 159 times [2022-01-31 21:07:14,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753135835] [2022-01-31 21:07:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:14,330 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:14,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:14,380 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:14,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:14,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:14,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:14,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:14,380 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:14,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:14,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:15,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:15,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753135835] [2022-01-31 21:07:15,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753135835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:15,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:15,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:07:15,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440192276] [2022-01-31 21:07:15,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:15,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:07:15,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:15,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:07:15,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:07:15,482 INFO L87 Difference]: Start difference. First operand 604 states and 910 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:07:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:17,628 INFO L93 Difference]: Finished difference Result 621 states and 926 transitions. [2022-01-31 21:07:17,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:07:17,628 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 83 [2022-01-31 21:07:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:17,629 INFO L225 Difference]: With dead ends: 621 [2022-01-31 21:07:17,629 INFO L226 Difference]: Without dead ends: 614 [2022-01-31 21:07:17,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4966 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:07:17,630 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 65 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3419 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:17,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 190 Invalid, 3529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3419 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:07:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-31 21:07:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 604. [2022-01-31 21:07:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5134228187919463) internal successors, (902), 598 states have internal predecessors, (902), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 909 transitions. [2022-01-31 21:07:17,825 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 909 transitions. Word has length 83 [2022-01-31 21:07:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:17,825 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 909 transitions. [2022-01-31 21:07:17,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:07:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 909 transitions. [2022-01-31 21:07:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:17,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:17,826 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:17,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-01-31 21:07:17,826 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:17,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2037593694, now seen corresponding path program 160 times [2022-01-31 21:07:17,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:17,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467525820] [2022-01-31 21:07:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:17,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:17,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:17,913 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:17,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:17,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:17,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:17,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:17,913 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:17,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:17,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:19,104 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:19,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467525820] [2022-01-31 21:07:19,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467525820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:19,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:19,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:07:19,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80982855] [2022-01-31 21:07:19,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:19,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:07:19,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:19,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:07:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:07:19,106 INFO L87 Difference]: Start difference. First operand 604 states and 909 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:07:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:21,565 INFO L93 Difference]: Finished difference Result 623 states and 927 transitions. [2022-01-31 21:07:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:07:21,566 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 83 [2022-01-31 21:07:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:21,566 INFO L225 Difference]: With dead ends: 623 [2022-01-31 21:07:21,567 INFO L226 Difference]: Without dead ends: 616 [2022-01-31 21:07:21,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5441 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=544, Invalid=14462, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:07:21,567 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 4234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:21,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 212 Invalid, 4234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:07:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-31 21:07:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 604. [2022-01-31 21:07:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.511744966442953) internal successors, (901), 598 states have internal predecessors, (901), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 908 transitions. [2022-01-31 21:07:21,751 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 908 transitions. Word has length 83 [2022-01-31 21:07:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:21,751 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 908 transitions. [2022-01-31 21:07:21,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:07:21,751 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 908 transitions. [2022-01-31 21:07:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:21,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:21,751 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:21,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-01-31 21:07:21,752 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:21,752 INFO L85 PathProgramCache]: Analyzing trace with hash -349575142, now seen corresponding path program 161 times [2022-01-31 21:07:21,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:21,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530740684] [2022-01-31 21:07:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:21,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:21,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:21,838 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:21,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:21,838 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:21,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:21,838 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:21,838 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:21,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:21,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:23,072 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:23,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530740684] [2022-01-31 21:07:23,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [530740684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:23,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:23,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:07:23,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306240182] [2022-01-31 21:07:23,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:23,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:07:23,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:07:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:07:23,074 INFO L87 Difference]: Start difference. First operand 604 states and 908 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:07:25,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:25,801 INFO L93 Difference]: Finished difference Result 625 states and 928 transitions. [2022-01-31 21:07:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:07:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 83 [2022-01-31 21:07:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:25,802 INFO L225 Difference]: With dead ends: 625 [2022-01-31 21:07:25,802 INFO L226 Difference]: Without dead ends: 618 [2022-01-31 21:07:25,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6121 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:07:25,803 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4772 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:25,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 229 Invalid, 4895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4772 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:07:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-31 21:07:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 604. [2022-01-31 21:07:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5100671140939597) internal successors, (900), 598 states have internal predecessors, (900), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 907 transitions. [2022-01-31 21:07:25,987 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 907 transitions. Word has length 83 [2022-01-31 21:07:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:25,987 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 907 transitions. [2022-01-31 21:07:25,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:07:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 907 transitions. [2022-01-31 21:07:25,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:25,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:25,987 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:25,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-01-31 21:07:25,987 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1017450530, now seen corresponding path program 162 times [2022-01-31 21:07:25,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:25,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933183393] [2022-01-31 21:07:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:26,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:26,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:26,082 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:26,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:26,082 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:26,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:26,082 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:26,082 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:26,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:26,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:27,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:27,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933183393] [2022-01-31 21:07:27,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1933183393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:27,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:27,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:07:27,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562514020] [2022-01-31 21:07:27,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:27,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:07:27,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:07:27,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:07:27,420 INFO L87 Difference]: Start difference. First operand 604 states and 907 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:07:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:30,464 INFO L93 Difference]: Finished difference Result 627 states and 929 transitions. [2022-01-31 21:07:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:07:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 83 [2022-01-31 21:07:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:30,465 INFO L225 Difference]: With dead ends: 627 [2022-01-31 21:07:30,465 INFO L226 Difference]: Without dead ends: 620 [2022-01-31 21:07:30,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6737 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=600, Invalid=17490, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:07:30,466 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 71 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 5589 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 5589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:30,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 251 Invalid, 5718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 5589 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:07:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-01-31 21:07:30,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 604. [2022-01-31 21:07:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5083892617449663) internal successors, (899), 598 states have internal predecessors, (899), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 906 transitions. [2022-01-31 21:07:30,650 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 906 transitions. Word has length 83 [2022-01-31 21:07:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:30,650 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 906 transitions. [2022-01-31 21:07:30,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:07:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 906 transitions. [2022-01-31 21:07:30,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:30,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:30,651 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:30,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-01-31 21:07:30,651 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:30,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:30,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1451712870, now seen corresponding path program 163 times [2022-01-31 21:07:30,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:30,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105502280] [2022-01-31 21:07:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:30,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:30,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:30,757 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:30,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:30,757 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:30,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:30,758 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:30,758 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:30,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:30,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:32,178 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:32,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105502280] [2022-01-31 21:07:32,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1105502280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:32,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:32,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:07:32,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764402270] [2022-01-31 21:07:32,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:32,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:07:32,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:32,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:07:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:07:32,180 INFO L87 Difference]: Start difference. First operand 604 states and 906 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:07:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:35,501 INFO L93 Difference]: Finished difference Result 629 states and 930 transitions. [2022-01-31 21:07:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:07:35,501 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 83 [2022-01-31 21:07:35,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:35,502 INFO L225 Difference]: With dead ends: 629 [2022-01-31 21:07:35,502 INFO L226 Difference]: Without dead ends: 622 [2022-01-31 21:07:35,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7362 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 21:07:35,503 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 73 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 6210 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 6344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 6210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:35,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 263 Invalid, 6344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 6210 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:07:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-31 21:07:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 604. [2022-01-31 21:07:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5067114093959733) internal successors, (898), 598 states have internal predecessors, (898), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 905 transitions. [2022-01-31 21:07:35,687 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 905 transitions. Word has length 83 [2022-01-31 21:07:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:35,687 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 905 transitions. [2022-01-31 21:07:35,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:07:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 905 transitions. [2022-01-31 21:07:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:35,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:35,688 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:35,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-01-31 21:07:35,688 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1645491874, now seen corresponding path program 164 times [2022-01-31 21:07:35,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:35,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451944370] [2022-01-31 21:07:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:35,724 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:35,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:35,774 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:35,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:35,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:35,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:35,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:35,774 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:35,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:35,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:37,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:37,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451944370] [2022-01-31 21:07:37,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1451944370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:37,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:37,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:07:37,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180967076] [2022-01-31 21:07:37,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:37,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:07:37,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:07:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:07:37,300 INFO L87 Difference]: Start difference. First operand 604 states and 905 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:07:40,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:40,640 INFO L93 Difference]: Finished difference Result 630 states and 930 transitions. [2022-01-31 21:07:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:07:40,643 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 83 [2022-01-31 21:07:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:40,644 INFO L225 Difference]: With dead ends: 630 [2022-01-31 21:07:40,644 INFO L226 Difference]: Without dead ends: 623 [2022-01-31 21:07:40,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7908 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=652, Invalid=20810, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:07:40,646 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 83 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5896 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 6037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 5896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:40,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 240 Invalid, 6037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 5896 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 21:07:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-31 21:07:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 604. [2022-01-31 21:07:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.50503355704698) internal successors, (897), 598 states have internal predecessors, (897), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 904 transitions. [2022-01-31 21:07:40,853 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 904 transitions. Word has length 83 [2022-01-31 21:07:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:40,853 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 904 transitions. [2022-01-31 21:07:40,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:07:40,853 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 904 transitions. [2022-01-31 21:07:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:40,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:40,853 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:40,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-01-31 21:07:40,854 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:40,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash 481441050, now seen corresponding path program 165 times [2022-01-31 21:07:40,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:40,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676636861] [2022-01-31 21:07:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:40,880 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:40,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:40,948 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:40,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:40,948 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:40,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:40,948 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:40,948 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:40,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:40,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:42,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:42,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676636861] [2022-01-31 21:07:42,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676636861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:42,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:42,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:07:42,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353703769] [2022-01-31 21:07:42,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:42,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:07:42,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:07:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=5778, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:07:42,550 INFO L87 Difference]: Start difference. First operand 604 states and 904 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 21:07:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:47,135 INFO L93 Difference]: Finished difference Result 745 states and 1113 transitions. [2022-01-31 21:07:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 21:07:47,136 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 83 [2022-01-31 21:07:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:47,137 INFO L225 Difference]: With dead ends: 745 [2022-01-31 21:07:47,137 INFO L226 Difference]: Without dead ends: 715 [2022-01-31 21:07:47,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8607 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=677, Invalid=22579, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 21:07:47,138 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 83 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 9414 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 9631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 9414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:47,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 299 Invalid, 9631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 9414 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 21:07:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-31 21:07:47,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 673. [2022-01-31 21:07:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 665 states have (on average 1.5203007518796992) internal successors, (1011), 667 states have internal predecessors, (1011), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:47,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1018 transitions. [2022-01-31 21:07:47,349 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1018 transitions. Word has length 83 [2022-01-31 21:07:47,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:47,349 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 1018 transitions. [2022-01-31 21:07:47,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 21:07:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1018 transitions. [2022-01-31 21:07:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:07:47,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:47,350 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:47,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-01-31 21:07:47,350 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:47,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:47,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2038518884, now seen corresponding path program 166 times [2022-01-31 21:07:47,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:47,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515517161] [2022-01-31 21:07:47,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:47,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:47,427 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:47,427 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:47,427 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:47,427 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:47,427 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:47,427 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:47,427 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:47,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:47,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:47,461 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 21:07:49,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:49,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515517161] [2022-01-31 21:07:49,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [515517161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:49,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:49,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 21:07:49,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729397096] [2022-01-31 21:07:49,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:49,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 21:07:49,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:49,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 21:07:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=6085, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:07:49,072 INFO L87 Difference]: Start difference. First operand 673 states and 1018 transitions. Second operand has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 77 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 21:07:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:53,053 INFO L93 Difference]: Finished difference Result 706 states and 1053 transitions. [2022-01-31 21:07:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 21:07:53,053 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:07:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:53,054 INFO L225 Difference]: With dead ends: 706 [2022-01-31 21:07:53,054 INFO L226 Difference]: Without dead ends: 698 [2022-01-31 21:07:53,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9317 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=699, Invalid=23793, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 21:07:53,055 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 102 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 7356 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 7523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 7356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:53,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 273 Invalid, 7523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 7356 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 21:07:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-01-31 21:07:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 675. [2022-01-31 21:07:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5187406296851573) internal successors, (1013), 669 states have internal predecessors, (1013), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1020 transitions. [2022-01-31 21:07:53,269 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1020 transitions. Word has length 83 [2022-01-31 21:07:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:53,269 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1020 transitions. [2022-01-31 21:07:53,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 77 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 21:07:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1020 transitions. [2022-01-31 21:07:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:07:53,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:53,269 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:53,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2022-01-31 21:07:53,270 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:53,270 INFO L85 PathProgramCache]: Analyzing trace with hash -111350810, now seen corresponding path program 167 times [2022-01-31 21:07:53,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:53,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606095403] [2022-01-31 21:07:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:53,306 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:53,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:53,374 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:53,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:53,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:53,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:53,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:53,374 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:53,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:53,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:54,222 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:54,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606095403] [2022-01-31 21:07:54,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1606095403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:54,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:54,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:07:54,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138063927] [2022-01-31 21:07:54,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:54,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:07:54,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:54,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:07:54,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:07:54,224 INFO L87 Difference]: Start difference. First operand 675 states and 1020 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:07:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:55,697 INFO L93 Difference]: Finished difference Result 683 states and 1027 transitions. [2022-01-31 21:07:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:07:55,697 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 86 [2022-01-31 21:07:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:55,698 INFO L225 Difference]: With dead ends: 683 [2022-01-31 21:07:55,698 INFO L226 Difference]: Without dead ends: 676 [2022-01-31 21:07:55,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:07:55,699 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:55,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 171 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2131 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:07:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-01-31 21:07:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 675. [2022-01-31 21:07:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5172413793103448) internal successors, (1012), 669 states have internal predecessors, (1012), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1019 transitions. [2022-01-31 21:07:55,907 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1019 transitions. Word has length 86 [2022-01-31 21:07:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:55,907 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1019 transitions. [2022-01-31 21:07:55,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:07:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1019 transitions. [2022-01-31 21:07:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:07:55,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:55,908 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:55,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-01-31 21:07:55,908 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2142689630, now seen corresponding path program 168 times [2022-01-31 21:07:55,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:55,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262956022] [2022-01-31 21:07:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:55,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:55,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:55,996 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:55,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:55,996 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:55,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:55,996 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:55,996 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:55,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:56,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:56,900 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:56,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262956022] [2022-01-31 21:07:56,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [262956022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:56,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:56,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:07:56,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850400341] [2022-01-31 21:07:56,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:56,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:07:56,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:56,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:07:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:07:56,901 INFO L87 Difference]: Start difference. First operand 675 states and 1019 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:07:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:58,586 INFO L93 Difference]: Finished difference Result 685 states and 1028 transitions. [2022-01-31 21:07:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:07:58,587 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 86 [2022-01-31 21:07:58,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:58,588 INFO L225 Difference]: With dead ends: 685 [2022-01-31 21:07:58,588 INFO L226 Difference]: Without dead ends: 678 [2022-01-31 21:07:58,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3634 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:07:58,588 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:58,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 188 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2607 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:07:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-31 21:07:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 675. [2022-01-31 21:07:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5157421289355322) internal successors, (1011), 669 states have internal predecessors, (1011), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:07:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1018 transitions. [2022-01-31 21:07:58,798 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1018 transitions. Word has length 86 [2022-01-31 21:07:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:58,798 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1018 transitions. [2022-01-31 21:07:58,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:07:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1018 transitions. [2022-01-31 21:07:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:07:58,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:58,798 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:58,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-01-31 21:07:58,799 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash 760825190, now seen corresponding path program 169 times [2022-01-31 21:07:58,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:58,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898094518] [2022-01-31 21:07:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:58,835 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:58,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:58,908 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:58,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:58,908 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:58,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:07:58,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:07:58,909 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:58,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:58,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:58,946 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 21:07:59,829 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898094518] [2022-01-31 21:07:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1898094518] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:59,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:59,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:07:59,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619252575] [2022-01-31 21:07:59,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:59,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:07:59,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:07:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:07:59,830 INFO L87 Difference]: Start difference. First operand 675 states and 1018 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:08:01,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:01,710 INFO L93 Difference]: Finished difference Result 687 states and 1029 transitions. [2022-01-31 21:08:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:08:01,711 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 86 [2022-01-31 21:08:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:01,712 INFO L225 Difference]: With dead ends: 687 [2022-01-31 21:08:01,712 INFO L226 Difference]: Without dead ends: 680 [2022-01-31 21:08:01,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3885 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:08:01,712 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2809 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:01,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 185 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2809 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:08:01,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-01-31 21:08:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 675. [2022-01-31 21:08:01,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5142428785607196) internal successors, (1010), 669 states have internal predecessors, (1010), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1017 transitions. [2022-01-31 21:08:01,921 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1017 transitions. Word has length 86 [2022-01-31 21:08:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:01,922 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1017 transitions. [2022-01-31 21:08:01,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:08:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1017 transitions. [2022-01-31 21:08:01,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:08:01,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:01,922 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:01,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2022-01-31 21:08:01,922 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2110209314, now seen corresponding path program 170 times [2022-01-31 21:08:01,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:01,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978841079] [2022-01-31 21:08:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:01,950 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:02,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:02,017 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:02,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:02,017 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:02,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:02,017 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:02,017 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:02,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:02,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:03,037 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:03,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978841079] [2022-01-31 21:08:03,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [978841079] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:03,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:03,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:08:03,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331678719] [2022-01-31 21:08:03,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:03,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:08:03,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:08:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:08:03,038 INFO L87 Difference]: Start difference. First operand 675 states and 1017 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:08:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:05,009 INFO L93 Difference]: Finished difference Result 689 states and 1030 transitions. [2022-01-31 21:08:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:08:05,010 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 86 [2022-01-31 21:08:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:05,011 INFO L225 Difference]: With dead ends: 689 [2022-01-31 21:08:05,011 INFO L226 Difference]: Without dead ends: 682 [2022-01-31 21:08:05,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4501 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:08:05,011 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2907 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:05,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 177 Invalid, 3012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2907 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:08:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-31 21:08:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 675. [2022-01-31 21:08:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.512743628185907) internal successors, (1009), 669 states have internal predecessors, (1009), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1016 transitions. [2022-01-31 21:08:05,221 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1016 transitions. Word has length 86 [2022-01-31 21:08:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:05,221 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1016 transitions. [2022-01-31 21:08:05,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:08:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1016 transitions. [2022-01-31 21:08:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:08:05,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:05,222 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:05,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2022-01-31 21:08:05,222 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash -973685018, now seen corresponding path program 171 times [2022-01-31 21:08:05,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:05,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006446425] [2022-01-31 21:08:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:05,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:05,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:05,325 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:05,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:05,326 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:05,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:05,326 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:05,326 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:05,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:05,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:06,486 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:06,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006446425] [2022-01-31 21:08:06,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006446425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:06,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:06,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:08:06,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216774962] [2022-01-31 21:08:06,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:06,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:08:06,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:08:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:08:06,487 INFO L87 Difference]: Start difference. First operand 675 states and 1016 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:08:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:08,561 INFO L93 Difference]: Finished difference Result 691 states and 1031 transitions. [2022-01-31 21:08:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:08:08,561 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 86 [2022-01-31 21:08:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:08,562 INFO L225 Difference]: With dead ends: 691 [2022-01-31 21:08:08,562 INFO L226 Difference]: Without dead ends: 684 [2022-01-31 21:08:08,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5038 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:08:08,563 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:08,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 174 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3065 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:08:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-31 21:08:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 675. [2022-01-31 21:08:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5112443778110944) internal successors, (1008), 669 states have internal predecessors, (1008), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1015 transitions. [2022-01-31 21:08:08,794 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1015 transitions. Word has length 86 [2022-01-31 21:08:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:08,794 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1015 transitions. [2022-01-31 21:08:08,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:08:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1015 transitions. [2022-01-31 21:08:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:08:08,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:08,794 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:08,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2022-01-31 21:08:08,795 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1623706718, now seen corresponding path program 172 times [2022-01-31 21:08:08,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:08,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757987150] [2022-01-31 21:08:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:08,831 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:08,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:08,899 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:08,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:08,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:08,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:08,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:08,900 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:08,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:08,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:10,076 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:10,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757987150] [2022-01-31 21:08:10,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [757987150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:10,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:10,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:08:10,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817665154] [2022-01-31 21:08:10,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:10,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:08:10,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:10,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:08:10,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:08:10,077 INFO L87 Difference]: Start difference. First operand 675 states and 1015 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:08:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:12,709 INFO L93 Difference]: Finished difference Result 693 states and 1032 transitions. [2022-01-31 21:08:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:08:12,709 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 86 [2022-01-31 21:08:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:12,710 INFO L225 Difference]: With dead ends: 693 [2022-01-31 21:08:12,710 INFO L226 Difference]: Without dead ends: 686 [2022-01-31 21:08:12,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5516 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:08:12,711 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 4675 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 4791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:12,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 241 Invalid, 4791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4675 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:08:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-31 21:08:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 675. [2022-01-31 21:08:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5097451274362819) internal successors, (1007), 669 states have internal predecessors, (1007), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1014 transitions. [2022-01-31 21:08:12,956 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1014 transitions. Word has length 86 [2022-01-31 21:08:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:12,956 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1014 transitions. [2022-01-31 21:08:12,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:08:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1014 transitions. [2022-01-31 21:08:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:08:12,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:12,957 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:12,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2022-01-31 21:08:12,957 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:12,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1702012826, now seen corresponding path program 173 times [2022-01-31 21:08:12,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:12,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725089222] [2022-01-31 21:08:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:12,993 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:13,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:13,062 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:13,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:13,063 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:13,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:13,063 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:13,063 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:13,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:13,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:14,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:14,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725089222] [2022-01-31 21:08:14,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1725089222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:14,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:14,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:08:14,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617746727] [2022-01-31 21:08:14,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:14,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:08:14,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:08:14,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:08:14,291 INFO L87 Difference]: Start difference. First operand 675 states and 1014 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:08:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:16,948 INFO L93 Difference]: Finished difference Result 695 states and 1033 transitions. [2022-01-31 21:08:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:08:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 86 [2022-01-31 21:08:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:16,949 INFO L225 Difference]: With dead ends: 695 [2022-01-31 21:08:16,949 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 21:08:16,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6101 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:08:16,950 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4462 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 4584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:16,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 218 Invalid, 4584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4462 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:08:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 21:08:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 675. [2022-01-31 21:08:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5082458770614693) internal successors, (1006), 669 states have internal predecessors, (1006), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1013 transitions. [2022-01-31 21:08:17,161 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1013 transitions. Word has length 86 [2022-01-31 21:08:17,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:17,161 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1013 transitions. [2022-01-31 21:08:17,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:08:17,162 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1013 transitions. [2022-01-31 21:08:17,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:08:17,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:17,162 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:17,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2022-01-31 21:08:17,162 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash 205785634, now seen corresponding path program 174 times [2022-01-31 21:08:17,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:17,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601224944] [2022-01-31 21:08:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:17,199 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:17,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:17,266 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:17,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:17,266 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:17,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:17,266 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:17,267 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:17,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:17,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:18,604 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:18,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601224944] [2022-01-31 21:08:18,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601224944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:18,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:18,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:08:18,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986546965] [2022-01-31 21:08:18,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:18,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:08:18,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:18,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:08:18,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:08:18,606 INFO L87 Difference]: Start difference. First operand 675 states and 1013 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:08:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:21,543 INFO L93 Difference]: Finished difference Result 697 states and 1034 transitions. [2022-01-31 21:08:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:08:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 86 [2022-01-31 21:08:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:21,544 INFO L225 Difference]: With dead ends: 697 [2022-01-31 21:08:21,544 INFO L226 Difference]: Without dead ends: 690 [2022-01-31 21:08:21,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6733 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=600, Invalid=17490, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:08:21,545 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5137 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 5266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 5137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:21,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 235 Invalid, 5266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 5137 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:08:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-31 21:08:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 675. [2022-01-31 21:08:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5067466266866567) internal successors, (1005), 669 states have internal predecessors, (1005), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1012 transitions. [2022-01-31 21:08:21,764 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1012 transitions. Word has length 86 [2022-01-31 21:08:21,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:21,764 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1012 transitions. [2022-01-31 21:08:21,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:08:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1012 transitions. [2022-01-31 21:08:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:08:21,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:21,764 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:21,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-01-31 21:08:21,764 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash -462089754, now seen corresponding path program 175 times [2022-01-31 21:08:21,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:21,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087264360] [2022-01-31 21:08:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:21,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:21,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:21,868 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:21,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:21,868 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:21,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:21,868 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:21,868 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:21,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:21,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:23,262 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:23,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087264360] [2022-01-31 21:08:23,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087264360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:23,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:23,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:08:23,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596063642] [2022-01-31 21:08:23,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:23,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:08:23,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:08:23,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:08:23,264 INFO L87 Difference]: Start difference. First operand 675 states and 1012 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:08:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:26,337 INFO L93 Difference]: Finished difference Result 699 states and 1035 transitions. [2022-01-31 21:08:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:08:26,337 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 86 [2022-01-31 21:08:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:26,338 INFO L225 Difference]: With dead ends: 699 [2022-01-31 21:08:26,338 INFO L226 Difference]: Without dead ends: 692 [2022-01-31 21:08:26,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7368 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 21:08:26,339 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 78 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5220 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 5355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 5220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:26,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 227 Invalid, 5355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 5220 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:08:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-01-31 21:08:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 675. [2022-01-31 21:08:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5052473763118441) internal successors, (1004), 669 states have internal predecessors, (1004), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1011 transitions. [2022-01-31 21:08:26,567 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1011 transitions. Word has length 86 [2022-01-31 21:08:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:26,567 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1011 transitions. [2022-01-31 21:08:26,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:08:26,567 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1011 transitions. [2022-01-31 21:08:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:08:26,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:26,567 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:26,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-01-31 21:08:26,568 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash -896352094, now seen corresponding path program 176 times [2022-01-31 21:08:26,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:26,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150003222] [2022-01-31 21:08:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:26,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:26,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:26,655 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:26,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:26,655 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:26,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:26,656 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:26,656 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:26,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:26,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:28,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:28,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150003222] [2022-01-31 21:08:28,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1150003222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:28,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:28,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:08:28,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457638246] [2022-01-31 21:08:28,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:28,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:08:28,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:28,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:08:28,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:08:28,162 INFO L87 Difference]: Start difference. First operand 675 states and 1011 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:08:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:31,581 INFO L93 Difference]: Finished difference Result 701 states and 1036 transitions. [2022-01-31 21:08:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:08:31,581 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 86 [2022-01-31 21:08:31,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:31,582 INFO L225 Difference]: With dead ends: 701 [2022-01-31 21:08:31,582 INFO L226 Difference]: Without dead ends: 694 [2022-01-31 21:08:31,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8054 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=654, Invalid=20808, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:08:31,583 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 79 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 6083 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 6223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 6083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:31,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 249 Invalid, 6223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 6083 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 21:08:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-01-31 21:08:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 675. [2022-01-31 21:08:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5037481259370316) internal successors, (1003), 669 states have internal predecessors, (1003), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1010 transitions. [2022-01-31 21:08:31,802 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1010 transitions. Word has length 86 [2022-01-31 21:08:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:31,802 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1010 transitions. [2022-01-31 21:08:31,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:08:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1010 transitions. [2022-01-31 21:08:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:08:31,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:31,802 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:31,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2022-01-31 21:08:31,802 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1090131098, now seen corresponding path program 177 times [2022-01-31 21:08:31,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:31,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600198448] [2022-01-31 21:08:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:31,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:31,889 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:31,889 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:31,889 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:31,889 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:31,889 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:31,889 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:31,889 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:31,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:31,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:31,938 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 21:08:33,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600198448] [2022-01-31 21:08:33,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [600198448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:33,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:33,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:08:33,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222961838] [2022-01-31 21:08:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:33,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:08:33,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:08:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5777, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:08:33,494 INFO L87 Difference]: Start difference. First operand 675 states and 1010 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 21:08:37,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:37,547 INFO L93 Difference]: Finished difference Result 702 states and 1036 transitions. [2022-01-31 21:08:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 21:08:37,547 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 86 [2022-01-31 21:08:37,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:37,548 INFO L225 Difference]: With dead ends: 702 [2022-01-31 21:08:37,548 INFO L226 Difference]: Without dead ends: 695 [2022-01-31 21:08:37,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8740 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=681, Invalid=22575, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 21:08:37,549 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 7886 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 8032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 7886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:37,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 301 Invalid, 8032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 7886 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 21:08:37,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-31 21:08:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 675. [2022-01-31 21:08:37,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.502248875562219) internal successors, (1002), 669 states have internal predecessors, (1002), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1009 transitions. [2022-01-31 21:08:37,762 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1009 transitions. Word has length 86 [2022-01-31 21:08:37,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:37,762 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1009 transitions. [2022-01-31 21:08:37,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 21:08:37,762 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1009 transitions. [2022-01-31 21:08:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:08:37,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:37,763 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:37,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2022-01-31 21:08:37,763 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:37,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:37,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1036801826, now seen corresponding path program 178 times [2022-01-31 21:08:37,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:37,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489196523] [2022-01-31 21:08:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:37,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:37,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:37,868 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:37,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:37,868 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:37,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:37,868 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:37,869 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:37,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:37,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:39,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:39,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489196523] [2022-01-31 21:08:39,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489196523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:39,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:39,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:08:39,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373539695] [2022-01-31 21:08:39,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:39,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:08:39,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:39,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:08:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=6242, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:08:39,564 INFO L87 Difference]: Start difference. First operand 675 states and 1009 transitions. Second operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 21:08:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:44,486 INFO L93 Difference]: Finished difference Result 822 states and 1227 transitions. [2022-01-31 21:08:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 21:08:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 86 [2022-01-31 21:08:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:44,499 INFO L225 Difference]: With dead ends: 822 [2022-01-31 21:08:44,500 INFO L226 Difference]: Without dead ends: 791 [2022-01-31 21:08:44,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9475 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=706, Invalid=24416, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 21:08:44,501 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 87 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 10202 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 10428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 10202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:44,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 311 Invalid, 10428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 10202 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 21:08:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-01-31 21:08:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 747. [2022-01-31 21:08:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 739 states have (on average 1.516914749661705) internal successors, (1121), 741 states have internal predecessors, (1121), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1128 transitions. [2022-01-31 21:08:44,767 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1128 transitions. Word has length 86 [2022-01-31 21:08:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:44,767 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1128 transitions. [2022-01-31 21:08:44,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 21:08:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1128 transitions. [2022-01-31 21:08:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:08:44,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:44,768 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:44,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2022-01-31 21:08:44,768 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1483158108, now seen corresponding path program 179 times [2022-01-31 21:08:44,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:44,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59335709] [2022-01-31 21:08:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:44,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:44,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:44,878 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:44,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:44,878 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:44,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:44,878 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:44,878 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:44,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:44,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:46,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:46,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59335709] [2022-01-31 21:08:46,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [59335709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:46,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:46,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 21:08:46,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422030188] [2022-01-31 21:08:46,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:46,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 21:08:46,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 21:08:46,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 21:08:46,657 INFO L87 Difference]: Start difference. First operand 747 states and 1128 transitions. Second operand has 82 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 80 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 21:08:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:50,735 INFO L93 Difference]: Finished difference Result 781 states and 1164 transitions. [2022-01-31 21:08:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 21:08:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 80 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 21:08:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:50,736 INFO L225 Difference]: With dead ends: 781 [2022-01-31 21:08:50,736 INFO L226 Difference]: Without dead ends: 773 [2022-01-31 21:08:50,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9938 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=724, Invalid=25682, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 21:08:50,737 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 106 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 7162 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 7334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 7162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:50,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 259 Invalid, 7334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 7162 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 21:08:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-31 21:08:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 749. [2022-01-31 21:08:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 741 states have (on average 1.515519568151147) internal successors, (1123), 743 states have internal predecessors, (1123), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1130 transitions. [2022-01-31 21:08:51,080 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1130 transitions. Word has length 86 [2022-01-31 21:08:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:51,080 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1130 transitions. [2022-01-31 21:08:51,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 80 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 21:08:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1130 transitions. [2022-01-31 21:08:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:08:51,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:51,081 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:51,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2022-01-31 21:08:51,081 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:51,081 INFO L85 PathProgramCache]: Analyzing trace with hash -46911206, now seen corresponding path program 180 times [2022-01-31 21:08:51,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:51,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675854229] [2022-01-31 21:08:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:51,108 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:51,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:51,157 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:51,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:51,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:51,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:51,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:51,157 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:51,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:51,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:51,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675854229] [2022-01-31 21:08:51,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675854229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:51,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:51,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:08:51,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215097085] [2022-01-31 21:08:51,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:51,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:08:51,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:08:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:08:51,975 INFO L87 Difference]: Start difference. First operand 749 states and 1130 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:08:53,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:53,359 INFO L93 Difference]: Finished difference Result 756 states and 1136 transitions. [2022-01-31 21:08:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:08:53,360 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 89 [2022-01-31 21:08:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:53,360 INFO L225 Difference]: With dead ends: 756 [2022-01-31 21:08:53,360 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 21:08:53,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:08:53,361 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:53,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 150 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:08:53,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 21:08:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 711. [2022-01-31 21:08:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5248933143669985) internal successors, (1072), 705 states have internal predecessors, (1072), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1079 transitions. [2022-01-31 21:08:53,598 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1079 transitions. Word has length 89 [2022-01-31 21:08:53,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:53,598 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1079 transitions. [2022-01-31 21:08:53,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 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 21:08:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1079 transitions. [2022-01-31 21:08:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:08:53,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:53,599 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:53,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2022-01-31 21:08:53,599 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:53,599 INFO L85 PathProgramCache]: Analyzing trace with hash 427502814, now seen corresponding path program 181 times [2022-01-31 21:08:53,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:53,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237128801] [2022-01-31 21:08:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:53,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:53,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:53,676 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:53,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:53,677 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:53,677 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:53,677 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:53,677 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:53,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:53,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:54,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:54,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237128801] [2022-01-31 21:08:54,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1237128801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:54,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:54,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:08:54,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143474300] [2022-01-31 21:08:54,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:54,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:08:54,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:08:54,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:08:54,616 INFO L87 Difference]: Start difference. First operand 711 states and 1079 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:08:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:56,292 INFO L93 Difference]: Finished difference Result 720 states and 1087 transitions. [2022-01-31 21:08:56,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:08:56,292 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 89 [2022-01-31 21:08:56,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:56,293 INFO L225 Difference]: With dead ends: 720 [2022-01-31 21:08:56,293 INFO L226 Difference]: Without dead ends: 713 [2022-01-31 21:08:56,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 31 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3535 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:08:56,294 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:56,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 182 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:08:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-01-31 21:08:56,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 711. [2022-01-31 21:08:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.523470839260313) internal successors, (1071), 705 states have internal predecessors, (1071), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1078 transitions. [2022-01-31 21:08:56,524 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1078 transitions. Word has length 89 [2022-01-31 21:08:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:56,524 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1078 transitions. [2022-01-31 21:08:56,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:08:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1078 transitions. [2022-01-31 21:08:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:08:56,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:56,524 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:56,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2022-01-31 21:08:56,525 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:56,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1603836006, now seen corresponding path program 182 times [2022-01-31 21:08:56,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:56,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370096757] [2022-01-31 21:08:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:56,561 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:56,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:56,610 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:56,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:56,610 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:56,611 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:56,611 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:56,611 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:56,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:56,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:57,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:57,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370096757] [2022-01-31 21:08:57,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [370096757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:57,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:57,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:08:57,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307129599] [2022-01-31 21:08:57,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:57,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:08:57,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:57,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:08:57,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:08:57,567 INFO L87 Difference]: Start difference. First operand 711 states and 1078 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:08:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:59,386 INFO L93 Difference]: Finished difference Result 722 states and 1088 transitions. [2022-01-31 21:08:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:08:59,387 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 89 [2022-01-31 21:08:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:59,387 INFO L225 Difference]: With dead ends: 722 [2022-01-31 21:08:59,387 INFO L226 Difference]: Without dead ends: 715 [2022-01-31 21:08:59,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4018 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:08:59,388 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2745 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:59,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 184 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2745 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:08:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-31 21:08:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 711. [2022-01-31 21:08:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5220483641536273) internal successors, (1070), 705 states have internal predecessors, (1070), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:08:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1077 transitions. [2022-01-31 21:08:59,627 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1077 transitions. Word has length 89 [2022-01-31 21:08:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:59,627 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1077 transitions. [2022-01-31 21:08:59,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:08:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1077 transitions. [2022-01-31 21:08:59,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:08:59,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:59,627 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:59,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2022-01-31 21:08:59,628 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:59,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1299678814, now seen corresponding path program 183 times [2022-01-31 21:08:59,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:59,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945972545] [2022-01-31 21:08:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:59,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:59,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:59,723 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:59,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:59,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:59,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:08:59,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:08:59,724 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:59,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:59,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:00,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:00,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945972545] [2022-01-31 21:09:00,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [945972545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:00,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:00,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:09:00,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861798800] [2022-01-31 21:09:00,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:00,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:09:00,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:00,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:09:00,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:09:00,695 INFO L87 Difference]: Start difference. First operand 711 states and 1077 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:09:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:02,759 INFO L93 Difference]: Finished difference Result 724 states and 1089 transitions. [2022-01-31 21:09:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:09:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 89 [2022-01-31 21:09:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:02,760 INFO L225 Difference]: With dead ends: 724 [2022-01-31 21:09:02,760 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 21:09:02,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4446 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:09:02,761 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3279 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:02,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 201 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3279 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:09:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 21:09:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 711. [2022-01-31 21:09:03,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5206258890469417) internal successors, (1069), 705 states have internal predecessors, (1069), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1076 transitions. [2022-01-31 21:09:03,044 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1076 transitions. Word has length 89 [2022-01-31 21:09:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:03,044 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1076 transitions. [2022-01-31 21:09:03,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:09:03,044 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1076 transitions. [2022-01-31 21:09:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:09:03,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:03,045 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:03,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2022-01-31 21:09:03,045 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:03,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1645904358, now seen corresponding path program 184 times [2022-01-31 21:09:03,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:03,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735928137] [2022-01-31 21:09:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:03,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:03,123 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:03,124 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:03,124 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:03,124 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:03,124 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:03,124 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:03,124 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:03,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:03,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:04,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:04,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735928137] [2022-01-31 21:09:04,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1735928137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:04,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:04,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:09:04,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661790307] [2022-01-31 21:09:04,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:04,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:09:04,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:04,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:09:04,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:09:04,206 INFO L87 Difference]: Start difference. First operand 711 states and 1076 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:09:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:06,487 INFO L93 Difference]: Finished difference Result 726 states and 1090 transitions. [2022-01-31 21:09:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:09:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 89 [2022-01-31 21:09:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:06,489 INFO L225 Difference]: With dead ends: 726 [2022-01-31 21:09:06,489 INFO L226 Difference]: Without dead ends: 719 [2022-01-31 21:09:06,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5005 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:09:06,490 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3763 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 3873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:06,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 213 Invalid, 3873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3763 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:09:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-31 21:09:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 711. [2022-01-31 21:09:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5192034139402562) internal successors, (1068), 705 states have internal predecessors, (1068), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1075 transitions. [2022-01-31 21:09:06,721 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1075 transitions. Word has length 89 [2022-01-31 21:09:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:06,721 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1075 transitions. [2022-01-31 21:09:06,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:09:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1075 transitions. [2022-01-31 21:09:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:09:06,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:06,722 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:06,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2022-01-31 21:09:06,722 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:06,722 INFO L85 PathProgramCache]: Analyzing trace with hash -434831394, now seen corresponding path program 185 times [2022-01-31 21:09:06,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:06,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535697100] [2022-01-31 21:09:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:06,754 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:06,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:06,804 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:06,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:06,805 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:06,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:06,805 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:06,805 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:06,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:06,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:07,960 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:07,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535697100] [2022-01-31 21:09:07,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [535697100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:07,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:07,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:09:07,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188055456] [2022-01-31 21:09:07,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:07,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:09:07,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:09:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:09:07,961 INFO L87 Difference]: Start difference. First operand 711 states and 1075 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:09:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:10,490 INFO L93 Difference]: Finished difference Result 728 states and 1091 transitions. [2022-01-31 21:09:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:09:10,490 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 89 [2022-01-31 21:09:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:10,491 INFO L225 Difference]: With dead ends: 728 [2022-01-31 21:09:10,491 INFO L226 Difference]: Without dead ends: 721 [2022-01-31 21:09:10,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5439 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=544, Invalid=14462, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:09:10,492 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 4178 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 4178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:10,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 220 Invalid, 4295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 4178 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:09:10,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-31 21:09:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 711. [2022-01-31 21:09:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5177809388335703) internal successors, (1067), 705 states have internal predecessors, (1067), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1074 transitions. [2022-01-31 21:09:10,724 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1074 transitions. Word has length 89 [2022-01-31 21:09:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:10,724 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1074 transitions. [2022-01-31 21:09:10,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:09:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1074 transitions. [2022-01-31 21:09:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:09:10,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:10,725 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:10,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2022-01-31 21:09:10,725 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1084853094, now seen corresponding path program 186 times [2022-01-31 21:09:10,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:10,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973084115] [2022-01-31 21:09:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:10,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:10,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:10,805 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:10,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:10,806 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:10,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:10,806 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:10,806 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:10,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:10,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:12,033 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:12,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973084115] [2022-01-31 21:09:12,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [973084115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:12,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:12,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:09:12,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038694886] [2022-01-31 21:09:12,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:12,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:09:12,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:12,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:09:12,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:09:12,034 INFO L87 Difference]: Start difference. First operand 711 states and 1074 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:09:14,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:14,817 INFO L93 Difference]: Finished difference Result 730 states and 1092 transitions. [2022-01-31 21:09:14,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:09:14,818 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 89 [2022-01-31 21:09:14,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:14,818 INFO L225 Difference]: With dead ends: 730 [2022-01-31 21:09:14,818 INFO L226 Difference]: Without dead ends: 723 [2022-01-31 21:09:14,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6128 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:09:14,819 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 4836 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 4959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:14,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 237 Invalid, 4959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4836 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:09:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-01-31 21:09:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 711. [2022-01-31 21:09:15,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5163584637268848) internal successors, (1066), 705 states have internal predecessors, (1066), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1073 transitions. [2022-01-31 21:09:15,091 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1073 transitions. Word has length 89 [2022-01-31 21:09:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:15,091 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1073 transitions. [2022-01-31 21:09:15,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:09:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1073 transitions. [2022-01-31 21:09:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:09:15,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:15,092 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:15,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2022-01-31 21:09:15,092 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1163159202, now seen corresponding path program 187 times [2022-01-31 21:09:15,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:15,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30798018] [2022-01-31 21:09:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:15,118 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:15,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:15,169 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:15,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:15,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:15,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:15,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:15,169 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:15,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:15,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:16,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:16,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30798018] [2022-01-31 21:09:16,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [30798018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:16,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:16,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:09:16,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704456566] [2022-01-31 21:09:16,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:16,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:09:16,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:09:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:09:16,515 INFO L87 Difference]: Start difference. First operand 711 states and 1073 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:09:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:19,576 INFO L93 Difference]: Finished difference Result 732 states and 1093 transitions. [2022-01-31 21:09:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:09:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 89 [2022-01-31 21:09:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:19,577 INFO L225 Difference]: With dead ends: 732 [2022-01-31 21:09:19,577 INFO L226 Difference]: Without dead ends: 725 [2022-01-31 21:09:19,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=600, Invalid=17490, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:09:19,578 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 5415 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 5543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 5415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:19,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 249 Invalid, 5543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 5415 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:09:19,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-31 21:09:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 711. [2022-01-31 21:09:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5149359886201992) internal successors, (1065), 705 states have internal predecessors, (1065), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1072 transitions. [2022-01-31 21:09:19,819 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1072 transitions. Word has length 89 [2022-01-31 21:09:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:19,820 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1072 transitions. [2022-01-31 21:09:19,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:09:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1072 transitions. [2022-01-31 21:09:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:09:19,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:19,820 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:19,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2022-01-31 21:09:19,820 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash 744639258, now seen corresponding path program 188 times [2022-01-31 21:09:19,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:19,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390543690] [2022-01-31 21:09:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:19,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:19,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:19,915 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:19,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:19,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:19,916 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:19,916 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:19,916 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:19,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:19,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:21,336 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:21,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390543690] [2022-01-31 21:09:21,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [390543690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:21,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:21,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:09:21,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243500080] [2022-01-31 21:09:21,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:21,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:09:21,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:21,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:09:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:09:21,338 INFO L87 Difference]: Start difference. First operand 711 states and 1072 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:09:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:24,403 INFO L93 Difference]: Finished difference Result 734 states and 1094 transitions. [2022-01-31 21:09:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:09:24,403 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 89 [2022-01-31 21:09:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:24,404 INFO L225 Difference]: With dead ends: 734 [2022-01-31 21:09:24,404 INFO L226 Difference]: Without dead ends: 727 [2022-01-31 21:09:24,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 21:09:24,405 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 79 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4886 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 5021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 4886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:24,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 216 Invalid, 5021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 4886 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:09:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-31 21:09:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 711. [2022-01-31 21:09:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5135135135135136) internal successors, (1064), 705 states have internal predecessors, (1064), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1071 transitions. [2022-01-31 21:09:24,688 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1071 transitions. Word has length 89 [2022-01-31 21:09:24,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:24,688 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1071 transitions. [2022-01-31 21:09:24,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:09:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1071 transitions. [2022-01-31 21:09:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:09:24,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:24,689 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:24,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-01-31 21:09:24,689 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash 76763870, now seen corresponding path program 189 times [2022-01-31 21:09:24,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:24,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067545956] [2022-01-31 21:09:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:24,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:24,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:24,766 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:24,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:24,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:24,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:24,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:24,766 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:24,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:24,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:26,371 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:26,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067545956] [2022-01-31 21:09:26,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067545956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:26,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:26,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:09:26,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104629482] [2022-01-31 21:09:26,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:26,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:09:26,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:26,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:09:26,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:09:26,373 INFO L87 Difference]: Start difference. First operand 711 states and 1071 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:09:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:29,824 INFO L93 Difference]: Finished difference Result 736 states and 1095 transitions. [2022-01-31 21:09:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:09:29,824 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 89 [2022-01-31 21:09:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:29,825 INFO L225 Difference]: With dead ends: 736 [2022-01-31 21:09:29,825 INFO L226 Difference]: Without dead ends: 729 [2022-01-31 21:09:29,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7932 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=652, Invalid=20810, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:09:29,826 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 80 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5859 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 5999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 5859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:29,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 243 Invalid, 5999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 5859 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 21:09:29,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-01-31 21:09:30,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 711. [2022-01-31 21:09:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5120910384068278) internal successors, (1063), 705 states have internal predecessors, (1063), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1070 transitions. [2022-01-31 21:09:30,078 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1070 transitions. Word has length 89 [2022-01-31 21:09:30,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:30,078 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1070 transitions. [2022-01-31 21:09:30,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:09:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1070 transitions. [2022-01-31 21:09:30,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:09:30,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:30,078 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:30,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-01-31 21:09:30,079 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:30,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash -357498470, now seen corresponding path program 190 times [2022-01-31 21:09:30,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:30,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063535370] [2022-01-31 21:09:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:30,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:30,167 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:30,167 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:30,167 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:30,167 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:30,167 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:30,167 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:30,167 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:30,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:30,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:31,776 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:31,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063535370] [2022-01-31 21:09:31,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1063535370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:31,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:31,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:09:31,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398116543] [2022-01-31 21:09:31,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:31,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:09:31,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:09:31,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5777, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:09:31,777 INFO L87 Difference]: Start difference. First operand 711 states and 1070 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 21:09:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:35,501 INFO L93 Difference]: Finished difference Result 738 states and 1096 transitions. [2022-01-31 21:09:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 21:09:35,501 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 89 [2022-01-31 21:09:35,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:35,502 INFO L225 Difference]: With dead ends: 738 [2022-01-31 21:09:35,502 INFO L226 Difference]: Without dead ends: 731 [2022-01-31 21:09:35,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8758 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=681, Invalid=22575, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 21:09:35,503 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 84 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 6494 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 6641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 6494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:35,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 255 Invalid, 6641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 6494 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:09:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-31 21:09:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 711. [2022-01-31 21:09:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5106685633001422) internal successors, (1062), 705 states have internal predecessors, (1062), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1069 transitions. [2022-01-31 21:09:35,748 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1069 transitions. Word has length 89 [2022-01-31 21:09:35,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:35,748 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1069 transitions. [2022-01-31 21:09:35,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 21:09:35,748 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1069 transitions. [2022-01-31 21:09:35,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:09:35,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:35,748 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:35,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2022-01-31 21:09:35,749 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash -551277474, now seen corresponding path program 191 times [2022-01-31 21:09:35,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:35,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376713087] [2022-01-31 21:09:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:35,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:35,874 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:35,874 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:35,874 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:35,874 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:35,874 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:35,874 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:35,874 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:35,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:35,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:37,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:37,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376713087] [2022-01-31 21:09:37,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [376713087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:37,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:37,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:09:37,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482829459] [2022-01-31 21:09:37,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:37,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:09:37,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:37,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:09:37,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=6242, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:09:37,663 INFO L87 Difference]: Start difference. First operand 711 states and 1069 transitions. Second operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 21:09:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:41,938 INFO L93 Difference]: Finished difference Result 739 states and 1096 transitions. [2022-01-31 21:09:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 21:09:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 89 [2022-01-31 21:09:41,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:41,939 INFO L225 Difference]: With dead ends: 739 [2022-01-31 21:09:41,939 INFO L226 Difference]: Without dead ends: 732 [2022-01-31 21:09:41,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9489 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=708, Invalid=24414, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 21:09:41,941 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 84 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 8063 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 8215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 8063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:41,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 297 Invalid, 8215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 8063 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 21:09:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-31 21:09:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 711. [2022-01-31 21:09:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5092460881934566) internal successors, (1061), 705 states have internal predecessors, (1061), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1068 transitions. [2022-01-31 21:09:42,194 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1068 transitions. Word has length 89 [2022-01-31 21:09:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:42,194 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1068 transitions. [2022-01-31 21:09:42,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 21:09:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1068 transitions. [2022-01-31 21:09:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:09:42,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:42,194 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:42,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2022-01-31 21:09:42,194 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1575655450, now seen corresponding path program 192 times [2022-01-31 21:09:42,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:42,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353834031] [2022-01-31 21:09:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:42,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:42,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:42,311 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:42,311 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:42,311 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:42,311 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:42,311 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:42,311 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:42,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:42,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:42,345 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 21:09:44,157 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:44,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353834031] [2022-01-31 21:09:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [353834031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:44,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:44,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 21:09:44,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631693336] [2022-01-31 21:09:44,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:44,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 21:09:44,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 21:09:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=6725, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:09:44,158 INFO L87 Difference]: Start difference. First operand 711 states and 1068 transitions. Second operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 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 21:09:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:49,388 INFO L93 Difference]: Finished difference Result 864 states and 1295 transitions. [2022-01-31 21:09:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 21:09:49,388 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 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 89 [2022-01-31 21:09:49,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:49,390 INFO L225 Difference]: With dead ends: 864 [2022-01-31 21:09:49,390 INFO L226 Difference]: Without dead ends: 832 [2022-01-31 21:09:49,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10244 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=733, Invalid=26327, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 21:09:49,391 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 91 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 10616 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 10852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 10616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:49,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 313 Invalid, 10852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 10616 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 21:09:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-31 21:09:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 786. [2022-01-31 21:09:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 778 states have (on average 1.5231362467866323) internal successors, (1185), 780 states have internal predecessors, (1185), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1192 transitions. [2022-01-31 21:09:49,658 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1192 transitions. Word has length 89 [2022-01-31 21:09:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:49,658 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1192 transitions. [2022-01-31 21:09:49,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 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 21:09:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1192 transitions. [2022-01-31 21:09:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:09:49,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:49,658 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:49,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2022-01-31 21:09:49,658 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:49,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:49,659 INFO L85 PathProgramCache]: Analyzing trace with hash -944304484, now seen corresponding path program 193 times [2022-01-31 21:09:49,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:49,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157847778] [2022-01-31 21:09:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:49,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:49,784 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:49,784 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:49,784 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:49,784 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:49,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:49,785 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:49,785 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:49,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:49,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:51,657 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:51,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157847778] [2022-01-31 21:09:51,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [157847778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:51,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:51,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 21:09:51,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238641915] [2022-01-31 21:09:51,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:51,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 21:09:51,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 21:09:51,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=7057, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:09:51,659 INFO L87 Difference]: Start difference. First operand 786 states and 1192 transitions. Second operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 83 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 21:09:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:56,590 INFO L93 Difference]: Finished difference Result 821 states and 1229 transitions. [2022-01-31 21:09:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 21:09:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 21:09:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:56,592 INFO L225 Difference]: With dead ends: 821 [2022-01-31 21:09:56,592 INFO L226 Difference]: Without dead ends: 813 [2022-01-31 21:09:56,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10873 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=753, Invalid=27639, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 21:09:56,593 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 99 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 9564 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 9742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 9564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:56,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 325 Invalid, 9742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 9564 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 21:09:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-31 21:09:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 788. [2022-01-31 21:09:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5217948717948717) internal successors, (1187), 782 states have internal predecessors, (1187), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1194 transitions. [2022-01-31 21:09:56,871 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1194 transitions. Word has length 89 [2022-01-31 21:09:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:56,871 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1194 transitions. [2022-01-31 21:09:56,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 83 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 21:09:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1194 transitions. [2022-01-31 21:09:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:09:56,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:56,872 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:56,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2022-01-31 21:09:56,872 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:56,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1646351070, now seen corresponding path program 194 times [2022-01-31 21:09:56,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:56,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978056177] [2022-01-31 21:09:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:56,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:56,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:56,959 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:56,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:56,959 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:56,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:56,959 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:56,960 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:56,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:57,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:57,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:57,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978056177] [2022-01-31 21:09:57,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1978056177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:57,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:57,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:09:57,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184992625] [2022-01-31 21:09:57,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:57,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:09:57,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:57,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:09:57,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:09:57,914 INFO L87 Difference]: Start difference. First operand 788 states and 1194 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:09:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:59,496 INFO L93 Difference]: Finished difference Result 796 states and 1201 transitions. [2022-01-31 21:09:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:09:59,496 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 92 [2022-01-31 21:09:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:59,497 INFO L225 Difference]: With dead ends: 796 [2022-01-31 21:09:59,497 INFO L226 Difference]: Without dead ends: 789 [2022-01-31 21:09:59,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3530 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:09:59,497 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:59,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 156 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:09:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-31 21:09:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 788. [2022-01-31 21:09:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5205128205128204) internal successors, (1186), 782 states have internal predecessors, (1186), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:09:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1193 transitions. [2022-01-31 21:09:59,764 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1193 transitions. Word has length 92 [2022-01-31 21:09:59,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:59,765 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1193 transitions. [2022-01-31 21:09:59,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:09:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1193 transitions. [2022-01-31 21:09:59,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:09:59,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:59,765 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:59,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2022-01-31 21:09:59,765 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:59,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1171937050, now seen corresponding path program 195 times [2022-01-31 21:09:59,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:59,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565099697] [2022-01-31 21:09:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:59,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:59,858 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:59,859 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:59,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:59,859 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:59,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:09:59,859 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:09:59,859 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:59,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:59,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:00,824 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:00,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565099697] [2022-01-31 21:10:00,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1565099697] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:00,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:00,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:10:00,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957292008] [2022-01-31 21:10:00,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:00,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:10:00,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:00,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:10:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:10:00,825 INFO L87 Difference]: Start difference. First operand 788 states and 1193 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:10:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:02,710 INFO L93 Difference]: Finished difference Result 798 states and 1202 transitions. [2022-01-31 21:10:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:10:02,710 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 92 [2022-01-31 21:10:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:02,711 INFO L225 Difference]: With dead ends: 798 [2022-01-31 21:10:02,711 INFO L226 Difference]: Without dead ends: 791 [2022-01-31 21:10:02,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:10:02,712 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 2834 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:02,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 193 Invalid, 2933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2834 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:10:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-01-31 21:10:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 788. [2022-01-31 21:10:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5192307692307692) internal successors, (1185), 782 states have internal predecessors, (1185), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1192 transitions. [2022-01-31 21:10:02,980 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1192 transitions. Word has length 92 [2022-01-31 21:10:02,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:02,980 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1192 transitions. [2022-01-31 21:10:02,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:10:02,980 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1192 transitions. [2022-01-31 21:10:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:02,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:02,980 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:02,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-01-31 21:10:02,981 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:02,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1091691426, now seen corresponding path program 196 times [2022-01-31 21:10:02,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:02,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206509006] [2022-01-31 21:10:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:03,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:03,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:03,068 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:03,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:03,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:03,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:03,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:03,068 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:03,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:03,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:03,105 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 21:10:04,100 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:04,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206509006] [2022-01-31 21:10:04,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1206509006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:04,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:04,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:10:04,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529691862] [2022-01-31 21:10:04,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:04,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:10:04,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:04,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:10:04,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:10:04,101 INFO L87 Difference]: Start difference. First operand 788 states and 1192 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:10:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:06,182 INFO L93 Difference]: Finished difference Result 800 states and 1203 transitions. [2022-01-31 21:10:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:10:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 92 [2022-01-31 21:10:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:06,184 INFO L225 Difference]: With dead ends: 800 [2022-01-31 21:10:06,184 INFO L226 Difference]: Without dead ends: 793 [2022-01-31 21:10:06,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4446 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=11720, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:10:06,185 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3117 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 3221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:06,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 195 Invalid, 3221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3117 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:10:06,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-01-31 21:10:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 788. [2022-01-31 21:10:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5179487179487179) internal successors, (1184), 782 states have internal predecessors, (1184), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1191 transitions. [2022-01-31 21:10:06,476 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1191 transitions. Word has length 92 [2022-01-31 21:10:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:06,476 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1191 transitions. [2022-01-31 21:10:06,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:10:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1191 transitions. [2022-01-31 21:10:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:06,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:06,477 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:06,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-01-31 21:10:06,477 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:06,478 INFO L85 PathProgramCache]: Analyzing trace with hash -299761050, now seen corresponding path program 197 times [2022-01-31 21:10:06,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:06,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416616511] [2022-01-31 21:10:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:06,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:06,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:06,568 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:06,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:06,568 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:06,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:06,568 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:06,568 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:06,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:06,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:07,645 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:07,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416616511] [2022-01-31 21:10:07,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [416616511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:07,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:07,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:10:07,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208873619] [2022-01-31 21:10:07,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:07,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:10:07,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:07,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:10:07,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:10:07,647 INFO L87 Difference]: Start difference. First operand 788 states and 1191 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:10:09,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:09,929 INFO L93 Difference]: Finished difference Result 802 states and 1204 transitions. [2022-01-31 21:10:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:10:09,929 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 92 [2022-01-31 21:10:09,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:09,930 INFO L225 Difference]: With dead ends: 802 [2022-01-31 21:10:09,930 INFO L226 Difference]: Without dead ends: 795 [2022-01-31 21:10:09,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5040 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:10:09,931 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3497 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 3607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:09,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 202 Invalid, 3607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3497 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:10:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-31 21:10:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 788. [2022-01-31 21:10:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5166666666666666) internal successors, (1183), 782 states have internal predecessors, (1183), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1190 transitions. [2022-01-31 21:10:10,205 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1190 transitions. Word has length 92 [2022-01-31 21:10:10,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:10,205 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1190 transitions. [2022-01-31 21:10:10,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:10:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1190 transitions. [2022-01-31 21:10:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:10,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:10,205 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:10,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-01-31 21:10:10,206 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:10,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1049623074, now seen corresponding path program 198 times [2022-01-31 21:10:10,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:10,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432585583] [2022-01-31 21:10:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:10,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:10,307 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:10,308 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:10,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:10,308 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:10,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:10,308 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:10,308 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:10,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:10,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:11,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:11,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432585583] [2022-01-31 21:10:11,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432585583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:11,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:11,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:10:11,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137285157] [2022-01-31 21:10:11,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:11,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:10:11,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:10:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:10:11,537 INFO L87 Difference]: Start difference. First operand 788 states and 1190 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:10:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:13,966 INFO L93 Difference]: Finished difference Result 804 states and 1205 transitions. [2022-01-31 21:10:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:10:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 92 [2022-01-31 21:10:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:13,967 INFO L225 Difference]: With dead ends: 804 [2022-01-31 21:10:13,967 INFO L226 Difference]: Without dead ends: 797 [2022-01-31 21:10:13,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5643 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:10:13,968 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3800 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 3916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:13,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 204 Invalid, 3916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3800 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:10:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-31 21:10:14,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 788. [2022-01-31 21:10:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5153846153846153) internal successors, (1182), 782 states have internal predecessors, (1182), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1189 transitions. [2022-01-31 21:10:14,236 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1189 transitions. Word has length 92 [2022-01-31 21:10:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:14,236 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1189 transitions. [2022-01-31 21:10:14,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:10:14,236 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1189 transitions. [2022-01-31 21:10:14,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:14,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:14,237 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:14,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2022-01-31 21:10:14,237 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:14,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2034271258, now seen corresponding path program 199 times [2022-01-31 21:10:14,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:14,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657867701] [2022-01-31 21:10:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:14,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:14,314 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:14,315 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:14,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:14,315 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:14,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:14,315 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:14,315 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:14,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:15,572 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:15,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657867701] [2022-01-31 21:10:15,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657867701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:15,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:15,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:10:15,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691611413] [2022-01-31 21:10:15,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:15,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:10:15,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:10:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:10:15,574 INFO L87 Difference]: Start difference. First operand 788 states and 1189 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:10:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:18,494 INFO L93 Difference]: Finished difference Result 806 states and 1206 transitions. [2022-01-31 21:10:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:10:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 92 [2022-01-31 21:10:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:18,496 INFO L225 Difference]: With dead ends: 806 [2022-01-31 21:10:18,496 INFO L226 Difference]: Without dead ends: 799 [2022-01-31 21:10:18,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6173 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:10:18,496 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 5078 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 5078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:18,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 251 Invalid, 5200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 5078 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:10:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-31 21:10:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 788. [2022-01-31 21:10:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.514102564102564) internal successors, (1181), 782 states have internal predecessors, (1181), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1188 transitions. [2022-01-31 21:10:18,767 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1188 transitions. Word has length 92 [2022-01-31 21:10:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:18,767 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1188 transitions. [2022-01-31 21:10:18,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:10:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1188 transitions. [2022-01-31 21:10:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:18,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:18,768 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:18,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2022-01-31 21:10:18,768 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1610674338, now seen corresponding path program 200 times [2022-01-31 21:10:18,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:18,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310145418] [2022-01-31 21:10:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:18,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:18,854 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:18,854 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:18,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:18,855 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:18,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:18,855 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:18,855 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:18,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:18,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:20,241 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:20,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310145418] [2022-01-31 21:10:20,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [310145418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:20,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:20,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:10:20,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868614123] [2022-01-31 21:10:20,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:20,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:10:20,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:10:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:10:20,242 INFO L87 Difference]: Start difference. First operand 788 states and 1188 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:10:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:23,418 INFO L93 Difference]: Finished difference Result 808 states and 1207 transitions. [2022-01-31 21:10:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:10:23,418 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 92 [2022-01-31 21:10:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:23,419 INFO L225 Difference]: With dead ends: 808 [2022-01-31 21:10:23,419 INFO L226 Difference]: Without dead ends: 801 [2022-01-31 21:10:23,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6673 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=598, Invalid=17492, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:10:23,420 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 5556 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 5684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 5556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:23,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 258 Invalid, 5684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 5556 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:10:23,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-31 21:10:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 788. [2022-01-31 21:10:23,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5128205128205128) internal successors, (1180), 782 states have internal predecessors, (1180), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1187 transitions. [2022-01-31 21:10:23,691 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1187 transitions. Word has length 92 [2022-01-31 21:10:23,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:23,691 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1187 transitions. [2022-01-31 21:10:23,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:10:23,692 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1187 transitions. [2022-01-31 21:10:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:23,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:23,692 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:23,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2022-01-31 21:10:23,692 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1532368230, now seen corresponding path program 201 times [2022-01-31 21:10:23,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:23,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690457735] [2022-01-31 21:10:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:23,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:23,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:23,788 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:23,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:23,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:23,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:23,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:23,788 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:23,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:25,236 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:25,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690457735] [2022-01-31 21:10:25,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [690457735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:25,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:25,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:10:25,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560470986] [2022-01-31 21:10:25,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:25,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:10:25,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:25,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:10:25,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:10:25,237 INFO L87 Difference]: Start difference. First operand 788 states and 1187 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:10:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:28,565 INFO L93 Difference]: Finished difference Result 810 states and 1208 transitions. [2022-01-31 21:10:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:10:28,565 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 92 [2022-01-31 21:10:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:28,566 INFO L225 Difference]: With dead ends: 810 [2022-01-31 21:10:28,566 INFO L226 Difference]: Without dead ends: 803 [2022-01-31 21:10:28,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 21:10:28,567 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 5810 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 5945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 5810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:28,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 255 Invalid, 5945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 5810 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:10:28,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-31 21:10:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 788. [2022-01-31 21:10:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5115384615384615) internal successors, (1179), 782 states have internal predecessors, (1179), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1186 transitions. [2022-01-31 21:10:28,840 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1186 transitions. Word has length 92 [2022-01-31 21:10:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:28,840 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1186 transitions. [2022-01-31 21:10:28,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:10:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1186 transitions. [2022-01-31 21:10:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:28,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:28,841 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:28,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2022-01-31 21:10:28,841 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:28,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:28,841 INFO L85 PathProgramCache]: Analyzing trace with hash -854800606, now seen corresponding path program 202 times [2022-01-31 21:10:28,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:28,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369307001] [2022-01-31 21:10:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:28,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:28,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:28,935 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:28,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:28,936 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:28,936 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:28,936 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:28,936 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:28,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:28,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:30,471 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:30,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369307001] [2022-01-31 21:10:30,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369307001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:30,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:30,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:10:30,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766635569] [2022-01-31 21:10:30,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:30,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:10:30,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:30,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:10:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:10:30,473 INFO L87 Difference]: Start difference. First operand 788 states and 1186 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:10:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:33,988 INFO L93 Difference]: Finished difference Result 812 states and 1209 transitions. [2022-01-31 21:10:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:10:33,988 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 92 [2022-01-31 21:10:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:33,989 INFO L225 Difference]: With dead ends: 812 [2022-01-31 21:10:33,990 INFO L226 Difference]: Without dead ends: 805 [2022-01-31 21:10:33,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8071 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=654, Invalid=20808, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:10:33,991 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 78 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 6042 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 6182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 6042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:33,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 252 Invalid, 6182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 6042 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 21:10:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-31 21:10:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 788. [2022-01-31 21:10:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5102564102564102) internal successors, (1178), 782 states have internal predecessors, (1178), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1185 transitions. [2022-01-31 21:10:34,262 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1185 transitions. Word has length 92 [2022-01-31 21:10:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:34,262 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1185 transitions. [2022-01-31 21:10:34,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:10:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1185 transitions. [2022-01-31 21:10:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:34,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:34,263 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:34,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2022-01-31 21:10:34,263 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1522675994, now seen corresponding path program 203 times [2022-01-31 21:10:34,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:34,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549984413] [2022-01-31 21:10:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:34,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:34,350 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:34,350 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:34,350 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:34,350 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:34,350 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:34,350 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:34,350 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:34,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:34,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:35,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:35,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549984413] [2022-01-31 21:10:35,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549984413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:35,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:35,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:10:35,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462642525] [2022-01-31 21:10:35,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:35,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:10:35,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:10:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5777, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:10:35,944 INFO L87 Difference]: Start difference. First operand 788 states and 1185 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 21:10:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:39,881 INFO L93 Difference]: Finished difference Result 814 states and 1210 transitions. [2022-01-31 21:10:39,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 21:10:39,881 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 92 [2022-01-31 21:10:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:39,883 INFO L225 Difference]: With dead ends: 814 [2022-01-31 21:10:39,883 INFO L226 Difference]: Without dead ends: 807 [2022-01-31 21:10:39,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8745 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=681, Invalid=22575, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 21:10:39,884 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 81 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 7113 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 7259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 7113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:39,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 279 Invalid, 7259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 7113 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 21:10:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-31 21:10:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 788. [2022-01-31 21:10:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.508974358974359) internal successors, (1177), 782 states have internal predecessors, (1177), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1184 transitions. [2022-01-31 21:10:40,157 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1184 transitions. Word has length 92 [2022-01-31 21:10:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:40,157 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1184 transitions. [2022-01-31 21:10:40,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 21:10:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1184 transitions. [2022-01-31 21:10:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:40,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:40,158 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:40,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2022-01-31 21:10:40,158 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:40,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1956938334, now seen corresponding path program 204 times [2022-01-31 21:10:40,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:40,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009097495] [2022-01-31 21:10:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:40,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:40,252 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:40,252 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:40,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:40,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:40,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:40,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:40,253 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:40,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:40,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:41,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:41,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009097495] [2022-01-31 21:10:41,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009097495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:41,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:41,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:10:41,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393786851] [2022-01-31 21:10:41,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:41,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:10:41,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:41,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:10:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:10:41,984 INFO L87 Difference]: Start difference. First operand 788 states and 1184 transitions. Second operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 21:10:46,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:46,254 INFO L93 Difference]: Finished difference Result 816 states and 1211 transitions. [2022-01-31 21:10:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 21:10:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 92 [2022-01-31 21:10:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:46,255 INFO L225 Difference]: With dead ends: 816 [2022-01-31 21:10:46,255 INFO L226 Difference]: Without dead ends: 809 [2022-01-31 21:10:46,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9351 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=706, Invalid=24416, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 21:10:46,256 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 84 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 7820 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 7973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 7820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:46,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 291 Invalid, 7973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 7820 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 21:10:46,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-31 21:10:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 788. [2022-01-31 21:10:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5076923076923077) internal successors, (1176), 782 states have internal predecessors, (1176), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1183 transitions. [2022-01-31 21:10:46,579 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1183 transitions. Word has length 92 [2022-01-31 21:10:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:46,579 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1183 transitions. [2022-01-31 21:10:46,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 21:10:46,579 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1183 transitions. [2022-01-31 21:10:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:46,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:46,579 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:46,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2022-01-31 21:10:46,579 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:46,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2144249958, now seen corresponding path program 205 times [2022-01-31 21:10:46,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:46,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706125898] [2022-01-31 21:10:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:46,607 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:46,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:46,657 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:46,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:46,657 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:46,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:46,658 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:46,658 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:46,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:46,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:48,456 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:48,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706125898] [2022-01-31 21:10:48,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1706125898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:48,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:48,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 21:10:48,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337121253] [2022-01-31 21:10:48,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:48,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 21:10:48,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:48,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 21:10:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=6725, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:10:48,458 INFO L87 Difference]: Start difference. First operand 788 states and 1183 transitions. Second operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 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 21:10:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:52,797 INFO L93 Difference]: Finished difference Result 817 states and 1211 transitions. [2022-01-31 21:10:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 21:10:52,798 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 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 92 [2022-01-31 21:10:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:52,799 INFO L225 Difference]: With dead ends: 817 [2022-01-31 21:10:52,799 INFO L226 Difference]: Without dead ends: 810 [2022-01-31 21:10:52,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10243 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=735, Invalid=26325, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 21:10:52,800 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 7756 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 7914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 7756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:52,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 278 Invalid, 7914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 7756 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 21:10:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-01-31 21:10:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 788. [2022-01-31 21:10:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5064102564102564) internal successors, (1175), 782 states have internal predecessors, (1175), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:10:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1182 transitions. [2022-01-31 21:10:53,075 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1182 transitions. Word has length 92 [2022-01-31 21:10:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:53,075 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1182 transitions. [2022-01-31 21:10:53,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 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 21:10:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1182 transitions. [2022-01-31 21:10:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:10:53,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:53,076 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:53,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2022-01-31 21:10:53,076 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:53,076 INFO L85 PathProgramCache]: Analyzing trace with hash -23784414, now seen corresponding path program 206 times [2022-01-31 21:10:53,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:53,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743052415] [2022-01-31 21:10:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:53,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:53,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:53,163 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:53,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:53,163 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:53,164 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:10:53,164 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:10:53,164 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:53,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:53,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:55,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:55,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743052415] [2022-01-31 21:10:55,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [743052415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:55,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:55,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 21:10:55,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158185052] [2022-01-31 21:10:55,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:55,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 21:10:55,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:55,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 21:10:55,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=7226, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:10:55,103 INFO L87 Difference]: Start difference. First operand 788 states and 1182 transitions. Second operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 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 21:11:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:00,494 INFO L93 Difference]: Finished difference Result 947 states and 1418 transitions. [2022-01-31 21:11:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 21:11:00,494 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 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 92 [2022-01-31 21:11:00,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:00,496 INFO L225 Difference]: With dead ends: 947 [2022-01-31 21:11:00,496 INFO L226 Difference]: Without dead ends: 914 [2022-01-31 21:11:00,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11043 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=760, Invalid=28310, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 21:11:00,498 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 93 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 10584 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 10828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 10584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:00,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 305 Invalid, 10828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 10584 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 21:11:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-01-31 21:11:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 866. [2022-01-31 21:11:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 858 states have (on average 1.5198135198135199) internal successors, (1304), 860 states have internal predecessors, (1304), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:00,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1311 transitions. [2022-01-31 21:11:00,807 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1311 transitions. Word has length 92 [2022-01-31 21:11:00,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:00,807 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1311 transitions. [2022-01-31 21:11:00,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 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 21:11:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1311 transitions. [2022-01-31 21:11:00,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:11:00,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:00,807 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:00,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2022-01-31 21:11:00,807 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:00,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1751222948, now seen corresponding path program 207 times [2022-01-31 21:11:00,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:00,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714540492] [2022-01-31 21:11:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:00,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:00,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:00,903 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:00,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:00,903 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:00,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:00,903 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:00,904 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:00,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:00,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:00,938 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 21:11:02,942 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:02,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714540492] [2022-01-31 21:11:02,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [714540492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:02,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:02,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 21:11:02,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073792155] [2022-01-31 21:11:02,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:02,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 21:11:02,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:02,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 21:11:02,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 21:11:02,943 INFO L87 Difference]: Start difference. First operand 866 states and 1311 transitions. Second operand has 88 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 86 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 21:11:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:08,175 INFO L93 Difference]: Finished difference Result 902 states and 1349 transitions. [2022-01-31 21:11:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 21:11:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 86 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 21:11:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:08,177 INFO L225 Difference]: With dead ends: 902 [2022-01-31 21:11:08,177 INFO L226 Difference]: Without dead ends: 894 [2022-01-31 21:11:08,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11542 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=778, Invalid=29672, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 21:11:08,179 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 112 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 9760 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 9947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 9760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:08,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 321 Invalid, 9947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 9760 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 21:11:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-01-31 21:11:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 868. [2022-01-31 21:11:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 860 states have (on average 1.5186046511627906) internal successors, (1306), 862 states have internal predecessors, (1306), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1313 transitions. [2022-01-31 21:11:08,496 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1313 transitions. Word has length 92 [2022-01-31 21:11:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:08,496 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1313 transitions. [2022-01-31 21:11:08,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 86 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 21:11:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1313 transitions. [2022-01-31 21:11:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:08,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:08,497 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:08,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2022-01-31 21:11:08,497 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash -722856354, now seen corresponding path program 208 times [2022-01-31 21:11:08,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:08,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92041376] [2022-01-31 21:11:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:08,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:08,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:08,583 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:08,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:08,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:08,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:08,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:08,584 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:08,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:08,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:09,412 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:09,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92041376] [2022-01-31 21:11:09,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [92041376] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:09,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:09,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:11:09,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032011340] [2022-01-31 21:11:09,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:09,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:11:09,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:09,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:11:09,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:11:09,413 INFO L87 Difference]: Start difference. First operand 868 states and 1313 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:11:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:11,001 INFO L93 Difference]: Finished difference Result 875 states and 1319 transitions. [2022-01-31 21:11:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:11:11,001 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 95 [2022-01-31 21:11:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:11,002 INFO L225 Difference]: With dead ends: 875 [2022-01-31 21:11:11,002 INFO L226 Difference]: Without dead ends: 868 [2022-01-31 21:11:11,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3435 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:11:11,003 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:11,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 160 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:11:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-31 21:11:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 827. [2022-01-31 21:11:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5274725274725274) internal successors, (1251), 821 states have internal predecessors, (1251), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1258 transitions. [2022-01-31 21:11:11,289 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1258 transitions. Word has length 95 [2022-01-31 21:11:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:11,290 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1258 transitions. [2022-01-31 21:11:11,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 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 21:11:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1258 transitions. [2022-01-31 21:11:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:11,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:11,290 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:11,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2022-01-31 21:11:11,290 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:11,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2102809626, now seen corresponding path program 209 times [2022-01-31 21:11:11,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:11,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831294574] [2022-01-31 21:11:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:11,327 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:11,381 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:11,382 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:11,382 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:11,382 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:11,382 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:11,382 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:11,382 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:11,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:11,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:12,352 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:12,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831294574] [2022-01-31 21:11:12,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [831294574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:12,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:12,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:11:12,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008463525] [2022-01-31 21:11:12,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:12,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:11:12,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:12,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:11:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:11:12,353 INFO L87 Difference]: Start difference. First operand 827 states and 1258 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:11:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:14,148 INFO L93 Difference]: Finished difference Result 836 states and 1266 transitions. [2022-01-31 21:11:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:11:14,149 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 95 [2022-01-31 21:11:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:14,150 INFO L225 Difference]: With dead ends: 836 [2022-01-31 21:11:14,150 INFO L226 Difference]: Without dead ends: 829 [2022-01-31 21:11:14,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4080 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:11:14,150 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:14,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 172 Invalid, 2556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:11:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-31 21:11:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 827. [2022-01-31 21:11:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5262515262515262) internal successors, (1250), 821 states have internal predecessors, (1250), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1257 transitions. [2022-01-31 21:11:14,442 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1257 transitions. Word has length 95 [2022-01-31 21:11:14,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:14,442 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1257 transitions. [2022-01-31 21:11:14,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 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 21:11:14,442 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1257 transitions. [2022-01-31 21:11:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:14,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:14,443 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:14,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2022-01-31 21:11:14,443 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:14,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1717743650, now seen corresponding path program 210 times [2022-01-31 21:11:14,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:14,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541842942] [2022-01-31 21:11:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:14,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:14,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:14,520 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:14,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:14,520 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:14,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:14,520 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:14,520 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:14,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:14,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:15,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:15,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541842942] [2022-01-31 21:11:15,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541842942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:15,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:15,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:11:15,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191949913] [2022-01-31 21:11:15,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:15,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:11:15,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:11:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:11:15,550 INFO L87 Difference]: Start difference. First operand 827 states and 1257 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:11:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:17,660 INFO L93 Difference]: Finished difference Result 838 states and 1267 transitions. [2022-01-31 21:11:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:11:17,661 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 95 [2022-01-31 21:11:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:17,662 INFO L225 Difference]: With dead ends: 838 [2022-01-31 21:11:17,662 INFO L226 Difference]: Without dead ends: 831 [2022-01-31 21:11:17,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:11:17,662 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3214 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 3319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:17,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 204 Invalid, 3319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3214 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:11:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-31 21:11:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 827. [2022-01-31 21:11:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.525030525030525) internal successors, (1249), 821 states have internal predecessors, (1249), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1256 transitions. [2022-01-31 21:11:17,956 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1256 transitions. Word has length 95 [2022-01-31 21:11:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:17,956 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1256 transitions. [2022-01-31 21:11:17,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 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 21:11:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1256 transitions. [2022-01-31 21:11:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:17,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:17,956 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:17,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2022-01-31 21:11:17,957 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash 545884826, now seen corresponding path program 211 times [2022-01-31 21:11:17,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:17,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686819389] [2022-01-31 21:11:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:17,984 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:18,054 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:18,054 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:18,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:18,055 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:18,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:18,055 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:18,055 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:18,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:18,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:19,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:19,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686819389] [2022-01-31 21:11:19,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1686819389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:19,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:19,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:11:19,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4632823] [2022-01-31 21:11:19,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:19,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:11:19,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:11:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:11:19,157 INFO L87 Difference]: Start difference. First operand 827 states and 1256 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:11:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:21,371 INFO L93 Difference]: Finished difference Result 840 states and 1268 transitions. [2022-01-31 21:11:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:11:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 95 [2022-01-31 21:11:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:21,372 INFO L225 Difference]: With dead ends: 840 [2022-01-31 21:11:21,372 INFO L226 Difference]: Without dead ends: 833 [2022-01-31 21:11:21,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4997 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:11:21,373 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3244 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:21,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 191 Invalid, 3355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3244 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:11:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-01-31 21:11:21,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 827. [2022-01-31 21:11:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5238095238095237) internal successors, (1248), 821 states have internal predecessors, (1248), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1255 transitions. [2022-01-31 21:11:21,666 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1255 transitions. Word has length 95 [2022-01-31 21:11:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:21,666 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1255 transitions. [2022-01-31 21:11:21,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 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 21:11:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1255 transitions. [2022-01-31 21:11:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:21,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:21,666 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:21,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2022-01-31 21:11:21,667 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:21,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:21,667 INFO L85 PathProgramCache]: Analyzing trace with hash -845567650, now seen corresponding path program 212 times [2022-01-31 21:11:21,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:21,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716580934] [2022-01-31 21:11:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:21,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:21,759 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:21,759 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:21,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:21,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:21,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:21,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:21,760 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:21,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:21,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:22,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:22,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716580934] [2022-01-31 21:11:22,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1716580934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:22,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:22,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:11:22,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133061317] [2022-01-31 21:11:22,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:22,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:11:22,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:11:22,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:11:22,923 INFO L87 Difference]: Start difference. First operand 827 states and 1255 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:11:25,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:25,381 INFO L93 Difference]: Finished difference Result 842 states and 1269 transitions. [2022-01-31 21:11:25,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:11:25,382 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 95 [2022-01-31 21:11:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:25,383 INFO L225 Difference]: With dead ends: 842 [2022-01-31 21:11:25,383 INFO L226 Difference]: Without dead ends: 835 [2022-01-31 21:11:25,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5557 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:11:25,384 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3719 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:25,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 203 Invalid, 3835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3719 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:11:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-31 21:11:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 827. [2022-01-31 21:11:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5225885225885225) internal successors, (1247), 821 states have internal predecessors, (1247), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1254 transitions. [2022-01-31 21:11:25,672 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1254 transitions. Word has length 95 [2022-01-31 21:11:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:25,672 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1254 transitions. [2022-01-31 21:11:25,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 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 21:11:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1254 transitions. [2022-01-31 21:11:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:25,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:25,673 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:25,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2022-01-31 21:11:25,673 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:25,673 INFO L85 PathProgramCache]: Analyzing trace with hash 503816474, now seen corresponding path program 213 times [2022-01-31 21:11:25,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:25,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788931285] [2022-01-31 21:11:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:25,710 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:25,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:25,779 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:25,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:25,779 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:25,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:25,779 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:25,779 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:25,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:25,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:27,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:27,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788931285] [2022-01-31 21:11:27,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [788931285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:27,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:27,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:11:27,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858962377] [2022-01-31 21:11:27,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:27,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:11:27,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:27,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:11:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:11:27,072 INFO L87 Difference]: Start difference. First operand 827 states and 1254 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:11:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:29,832 INFO L93 Difference]: Finished difference Result 844 states and 1270 transitions. [2022-01-31 21:11:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:11:29,832 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 95 [2022-01-31 21:11:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:29,833 INFO L225 Difference]: With dead ends: 844 [2022-01-31 21:11:29,833 INFO L226 Difference]: Without dead ends: 837 [2022-01-31 21:11:29,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6161 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:11:29,834 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4448 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 4570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:29,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 225 Invalid, 4570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4448 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:11:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-31 21:11:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 827. [2022-01-31 21:11:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5213675213675213) internal successors, (1246), 821 states have internal predecessors, (1246), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1253 transitions. [2022-01-31 21:11:30,128 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1253 transitions. Word has length 95 [2022-01-31 21:11:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:30,128 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1253 transitions. [2022-01-31 21:11:30,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 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 21:11:30,128 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1253 transitions. [2022-01-31 21:11:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:30,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:30,129 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:30,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2022-01-31 21:11:30,129 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1714889438, now seen corresponding path program 214 times [2022-01-31 21:11:30,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:30,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592744904] [2022-01-31 21:11:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:30,166 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:30,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:30,234 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:30,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:30,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:30,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:30,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:30,235 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:30,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:30,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:30,270 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 21:11:31,574 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:31,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592744904] [2022-01-31 21:11:31,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592744904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:31,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:31,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:11:31,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263702359] [2022-01-31 21:11:31,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:31,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:11:31,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:11:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:11:31,576 INFO L87 Difference]: Start difference. First operand 827 states and 1253 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:11:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:34,742 INFO L93 Difference]: Finished difference Result 846 states and 1271 transitions. [2022-01-31 21:11:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:11:34,742 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 95 [2022-01-31 21:11:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:34,743 INFO L225 Difference]: With dead ends: 846 [2022-01-31 21:11:34,743 INFO L226 Difference]: Without dead ends: 839 [2022-01-31 21:11:34,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=598, Invalid=17492, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:11:34,744 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 5352 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 5480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 5352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:34,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 252 Invalid, 5480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 5352 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:11:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-01-31 21:11:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 827. [2022-01-31 21:11:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.52014652014652) internal successors, (1245), 821 states have internal predecessors, (1245), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1252 transitions. [2022-01-31 21:11:35,039 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1252 transitions. Word has length 95 [2022-01-31 21:11:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:35,039 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1252 transitions. [2022-01-31 21:11:35,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 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 21:11:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1252 transitions. [2022-01-31 21:11:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:35,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:35,040 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:35,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2022-01-31 21:11:35,040 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1064867738, now seen corresponding path program 215 times [2022-01-31 21:11:35,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:35,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534805663] [2022-01-31 21:11:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:35,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:35,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:35,147 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:35,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:35,147 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:35,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:35,147 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:35,147 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:35,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:35,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:36,622 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:36,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534805663] [2022-01-31 21:11:36,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1534805663] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:36,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:36,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:11:36,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849711329] [2022-01-31 21:11:36,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:36,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:11:36,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:36,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:11:36,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:11:36,623 INFO L87 Difference]: Start difference. First operand 827 states and 1252 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:11:39,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:39,792 INFO L93 Difference]: Finished difference Result 848 states and 1272 transitions. [2022-01-31 21:11:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:11:39,792 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 95 [2022-01-31 21:11:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:39,793 INFO L225 Difference]: With dead ends: 848 [2022-01-31 21:11:39,793 INFO L226 Difference]: Without dead ends: 841 [2022-01-31 21:11:39,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7415 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 21:11:39,794 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 75 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 5105 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 5240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 5105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:39,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 229 Invalid, 5240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 5105 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:11:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-31 21:11:40,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 827. [2022-01-31 21:11:40,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5189255189255189) internal successors, (1244), 821 states have internal predecessors, (1244), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1251 transitions. [2022-01-31 21:11:40,090 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1251 transitions. Word has length 95 [2022-01-31 21:11:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:40,090 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1251 transitions. [2022-01-31 21:11:40,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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 21:11:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1251 transitions. [2022-01-31 21:11:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:40,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:40,091 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:40,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2022-01-31 21:11:40,091 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash 986561630, now seen corresponding path program 216 times [2022-01-31 21:11:40,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:40,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186892018] [2022-01-31 21:11:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:40,119 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:40,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:40,170 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:40,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:40,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:40,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:40,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:40,170 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:40,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:40,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:41,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:41,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186892018] [2022-01-31 21:11:41,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [186892018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:41,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:41,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:11:41,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530756099] [2022-01-31 21:11:41,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:41,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:11:41,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:11:41,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:11:41,763 INFO L87 Difference]: Start difference. First operand 827 states and 1251 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:11:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:45,457 INFO L93 Difference]: Finished difference Result 850 states and 1273 transitions. [2022-01-31 21:11:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:11:45,457 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 95 [2022-01-31 21:11:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:45,458 INFO L225 Difference]: With dead ends: 850 [2022-01-31 21:11:45,458 INFO L226 Difference]: Without dead ends: 843 [2022-01-31 21:11:45,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7950 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=652, Invalid=20810, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:11:45,459 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 73 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6481 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 6621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 6481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:45,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 271 Invalid, 6621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 6481 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:11:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-31 21:11:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 827. [2022-01-31 21:11:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5177045177045176) internal successors, (1243), 821 states have internal predecessors, (1243), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1250 transitions. [2022-01-31 21:11:45,756 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1250 transitions. Word has length 95 [2022-01-31 21:11:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:45,756 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1250 transitions. [2022-01-31 21:11:45,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 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 21:11:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1250 transitions. [2022-01-31 21:11:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:45,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:45,757 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:45,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2022-01-31 21:11:45,757 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:45,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1400607206, now seen corresponding path program 217 times [2022-01-31 21:11:45,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:45,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563103685] [2022-01-31 21:11:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:45,784 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:45,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:45,853 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:45,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:45,854 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:45,854 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:45,854 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:45,854 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:45,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:45,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:47,575 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:47,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563103685] [2022-01-31 21:11:47,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [563103685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:47,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:47,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:11:47,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064495345] [2022-01-31 21:11:47,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:47,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:11:47,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:11:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5777, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:11:47,577 INFO L87 Difference]: Start difference. First operand 827 states and 1250 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 21:11:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:51,365 INFO L93 Difference]: Finished difference Result 852 states and 1274 transitions. [2022-01-31 21:11:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 21:11:51,365 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 95 [2022-01-31 21:11:51,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:51,366 INFO L225 Difference]: With dead ends: 852 [2022-01-31 21:11:51,367 INFO L226 Difference]: Without dead ends: 845 [2022-01-31 21:11:51,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8788 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=681, Invalid=22575, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 21:11:51,368 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 6464 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 6611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 6464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:51,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 258 Invalid, 6611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 6464 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:11:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-31 21:11:51,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 827. [2022-01-31 21:11:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5164835164835164) internal successors, (1242), 821 states have internal predecessors, (1242), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1249 transitions. [2022-01-31 21:11:51,666 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1249 transitions. Word has length 95 [2022-01-31 21:11:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:51,666 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1249 transitions. [2022-01-31 21:11:51,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 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 21:11:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1249 transitions. [2022-01-31 21:11:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:51,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:51,667 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:51,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2022-01-31 21:11:51,667 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:51,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2068482594, now seen corresponding path program 218 times [2022-01-31 21:11:51,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:51,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024771234] [2022-01-31 21:11:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:51,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:51,756 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:51,756 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:51,756 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:51,756 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:51,756 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:51,757 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:51,757 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:51,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:51,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:53,521 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:53,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024771234] [2022-01-31 21:11:53,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024771234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:53,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:53,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:11:53,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455877391] [2022-01-31 21:11:53,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:53,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:11:53,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:11:53,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:11:53,523 INFO L87 Difference]: Start difference. First operand 827 states and 1249 transitions. Second operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 21:11:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:57,702 INFO L93 Difference]: Finished difference Result 854 states and 1275 transitions. [2022-01-31 21:11:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 21:11:57,703 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 95 [2022-01-31 21:11:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:57,704 INFO L225 Difference]: With dead ends: 854 [2022-01-31 21:11:57,704 INFO L226 Difference]: Without dead ends: 847 [2022-01-31 21:11:57,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9366 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=706, Invalid=24416, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 21:11:57,705 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 85 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 7267 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 7420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 7267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:57,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 275 Invalid, 7420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 7267 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 21:11:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-01-31 21:11:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 827. [2022-01-31 21:11:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5152625152625152) internal successors, (1241), 821 states have internal predecessors, (1241), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:11:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1248 transitions. [2022-01-31 21:11:58,004 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1248 transitions. Word has length 95 [2022-01-31 21:11:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:58,004 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1248 transitions. [2022-01-31 21:11:58,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 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 21:11:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1248 transitions. [2022-01-31 21:11:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:11:58,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:58,005 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:58,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2022-01-31 21:11:58,005 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:58,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1792222362, now seen corresponding path program 219 times [2022-01-31 21:11:58,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:58,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647886566] [2022-01-31 21:11:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:58,032 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:58,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:58,100 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:58,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:58,101 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:58,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:11:58,101 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:11:58,101 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:58,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:58,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:59,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:59,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647886566] [2022-01-31 21:11:59,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [647886566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:59,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:59,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 21:11:59,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461411716] [2022-01-31 21:11:59,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:59,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 21:11:59,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 21:11:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=6725, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:11:59,940 INFO L87 Difference]: Start difference. First operand 827 states and 1248 transitions. Second operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 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 21:12:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:04,389 INFO L93 Difference]: Finished difference Result 856 states and 1276 transitions. [2022-01-31 21:12:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 21:12:04,389 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 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 95 [2022-01-31 21:12:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:04,390 INFO L225 Difference]: With dead ends: 856 [2022-01-31 21:12:04,390 INFO L226 Difference]: Without dead ends: 849 [2022-01-31 21:12:04,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10243 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=735, Invalid=26325, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 21:12:04,391 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 84 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 7963 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 8121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 7963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:04,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 287 Invalid, 8121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 7963 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 21:12:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-31 21:12:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 827. [2022-01-31 21:12:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.514041514041514) internal successors, (1240), 821 states have internal predecessors, (1240), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:12:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1247 transitions. [2022-01-31 21:12:04,692 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1247 transitions. Word has length 95 [2022-01-31 21:12:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:04,693 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1247 transitions. [2022-01-31 21:12:04,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 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 21:12:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1247 transitions. [2022-01-31 21:12:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:12:04,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:04,693 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:04,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2022-01-31 21:12:04,693 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1598443358, now seen corresponding path program 220 times [2022-01-31 21:12:04,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:04,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712781537] [2022-01-31 21:12:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:04,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:04,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:04,789 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:04,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:12:04,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:12:04,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:12:04,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:12:04,789 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:04,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:04,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:06,742 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:06,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712781537] [2022-01-31 21:12:06,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1712781537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:06,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:06,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 21:12:06,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185960066] [2022-01-31 21:12:06,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:06,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 21:12:06,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 21:12:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:12:06,743 INFO L87 Difference]: Start difference. First operand 827 states and 1247 transitions. Second operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 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 21:12:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:11,634 INFO L93 Difference]: Finished difference Result 857 states and 1276 transitions. [2022-01-31 21:12:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 21:12:11,635 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 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 95 [2022-01-31 21:12:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:11,636 INFO L225 Difference]: With dead ends: 857 [2022-01-31 21:12:11,636 INFO L226 Difference]: Without dead ends: 850 [2022-01-31 21:12:11,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10895 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=760, Invalid=28310, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 21:12:11,637 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 8870 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 9034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 8870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:11,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 304 Invalid, 9034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 8870 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 21:12:11,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-31 21:12:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 827. [2022-01-31 21:12:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5128205128205128) internal successors, (1239), 821 states have internal predecessors, (1239), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:12:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1246 transitions. [2022-01-31 21:12:11,937 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1246 transitions. Word has length 95 [2022-01-31 21:12:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:11,937 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1246 transitions. [2022-01-31 21:12:11,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 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 21:12:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1246 transitions. [2022-01-31 21:12:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:12:11,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:11,938 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:11,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2022-01-31 21:12:11,938 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:11,939 INFO L85 PathProgramCache]: Analyzing trace with hash -569591014, now seen corresponding path program 221 times [2022-01-31 21:12:11,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:11,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38790112] [2022-01-31 21:12:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:11,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:12,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:12,034 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:12,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:12:12,034 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:12:12,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:12:12,034 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:12:12,034 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:12,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:12,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:14,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38790112] [2022-01-31 21:12:14,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [38790112] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:14,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:14,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 21:12:14,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278691240] [2022-01-31 21:12:14,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:14,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 21:12:14,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 21:12:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=7745, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 21:12:14,084 INFO L87 Difference]: Start difference. First operand 827 states and 1246 transitions. Second operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 87 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 21:12:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:20,666 INFO L93 Difference]: Finished difference Result 992 states and 1491 transitions. [2022-01-31 21:12:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 21:12:20,667 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 87 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 95 [2022-01-31 21:12:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:20,669 INFO L225 Difference]: With dead ends: 992 [2022-01-31 21:12:20,669 INFO L226 Difference]: Without dead ends: 958 [2022-01-31 21:12:20,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11872 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=787, Invalid=30365, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 21:12:20,671 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 91 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 13891 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 14145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 13891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:20,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 372 Invalid, 14145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 13891 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 21:12:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states.