/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:17:48,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:17:48,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:17:48,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:17:48,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 21:17:48,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 21:17:48,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 21:17:48,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 21:17:48,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 21:17:48,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 21:17:48,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 21:17:48,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 21:17:48,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 21:17:48,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 21:17:48,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 21:17:48,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 21:17:48,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 21:17:48,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 21:17:48,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 21:17:48,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 21:17:48,202 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 21:17:48,209 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:17:48,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:17:48,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:17:48,210 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:17:48,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:17:48,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:17:48,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:17:48,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:17:48,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:17:48,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:17:48,211 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:17:48,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:17:48,211 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:17:48,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:17:48,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:17:48,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:17:48,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:17:48,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:17:48,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:17:48,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:17:48,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:17:48,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:17:48,212 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:17:48,212 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:17:48,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:17:48,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:17:48,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:17:48,422 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:17:48,423 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:17:48,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-01-31 21:17:48,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e8df21f5/671d0e236319479485ef59c723241fa3/FLAG1f7ba95d7 [2022-01-31 21:17:48,843 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:17:48,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-01-31 21:17:48,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e8df21f5/671d0e236319479485ef59c723241fa3/FLAG1f7ba95d7 [2022-01-31 21:17:48,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e8df21f5/671d0e236319479485ef59c723241fa3 [2022-01-31 21:17:48,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:17:48,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:17:48,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:17:48,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:17:48,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:17:48,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:17:48" (1/1) ... [2022-01-31 21:17:48,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ef81aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:48, skipping insertion in model container [2022-01-31 21:17:48,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:17:48" (1/1) ... [2022-01-31 21:17:48,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:17:48,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:17:49,002 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-01-31 21:17:49,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:17:49,026 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:17:49,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-01-31 21:17:49,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:17:49,042 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:17:49,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:49 WrapperNode [2022-01-31 21:17:49,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:17:49,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:17:49,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:17:49,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:17:49,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:49" (1/1) ... [2022-01-31 21:17:49,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:49" (1/1) ... [2022-01-31 21:17:49,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:49" (1/1) ... [2022-01-31 21:17:49,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:49" (1/1) ... [2022-01-31 21:17:49,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:49" (1/1) ... [2022-01-31 21:17:49,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:49" (1/1) ... [2022-01-31 21:17:49,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:49" (1/1) ... [2022-01-31 21:17:49,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:17:49,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:17:49,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:17:49,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:17:49,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:49" (1/1) ... [2022-01-31 21:17:49,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:17:49,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:17:49,100 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 21:17:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:17:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:17:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:17:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 21:17:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 21:17:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:17:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 21:17:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:17:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:17:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:17:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:17:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 21:17:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:17:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:17:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:17:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:17:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:17:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:17:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:17:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:17:49,120 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 21:17:49,176 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:17:49,178 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:17:49,256 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:17:49,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:17:49,259 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 21:17:49,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:17:49 BoogieIcfgContainer [2022-01-31 21:17:49,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:17:49,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:17:49,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:17:49,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:17:49,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:17:48" (1/3) ... [2022-01-31 21:17:49,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f6a647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:17:49, skipping insertion in model container [2022-01-31 21:17:49,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:17:49" (2/3) ... [2022-01-31 21:17:49,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f6a647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:17:49, skipping insertion in model container [2022-01-31 21:17:49,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:17:49" (3/3) ... [2022-01-31 21:17:49,265 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.c [2022-01-31 21:17:49,268 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:17:49,268 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:17:49,308 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:17:49,312 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 21:17:49,312 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:17:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 21:17:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 21:17:49,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:49,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:49,325 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash -380103047, now seen corresponding path program 1 times [2022-01-31 21:17:49,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:49,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19701686] [2022-01-31 21:17:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:49,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:49,369 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:49,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:49,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:49,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19701686] [2022-01-31 21:17:49,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [19701686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:49,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:49,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 21:17:49,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504916429] [2022-01-31 21:17:49,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:49,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 21:17:49,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:49,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 21:17:49,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 21:17:49,528 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:49,633 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-01-31 21:17:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 21:17:49,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 21:17:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:49,642 INFO L225 Difference]: With dead ends: 36 [2022-01-31 21:17:49,642 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 21:17:49,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:17:49,647 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:49,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 21:17:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-01-31 21:17:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-31 21:17:49,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-01-31 21:17:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:49,672 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-31 21:17:49,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-31 21:17:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 21:17:49,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:49,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:49,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:17:49,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash 437044508, now seen corresponding path program 1 times [2022-01-31 21:17:49,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:49,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837979160] [2022-01-31 21:17:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:49,896 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 21:17:49,897 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:17:49,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:50,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:50,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:50,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837979160] [2022-01-31 21:17:50,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [837979160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:50,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:50,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:17:50,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352187697] [2022-01-31 21:17:50,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:50,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:17:50,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:17:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:50,273 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:51,005 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-01-31 21:17:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:17:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 21:17:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:51,007 INFO L225 Difference]: With dead ends: 24 [2022-01-31 21:17:51,007 INFO L226 Difference]: Without dead ends: 18 [2022-01-31 21:17:51,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:17:51,008 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:51,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:17:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-31 21:17:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-01-31 21:17:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-31 21:17:51,014 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2022-01-31 21:17:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:51,014 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-31 21:17:51,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-31 21:17:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 21:17:51,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:51,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:51,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:17:51,015 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2082915426, now seen corresponding path program 1 times [2022-01-31 21:17:51,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:51,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520402090] [2022-01-31 21:17:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:51,088 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 21:17:51,089 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:17:51,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:51,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:51,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:51,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520402090] [2022-01-31 21:17:51,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [520402090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:51,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:51,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:17:51,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320953934] [2022-01-31 21:17:51,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:51,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:17:51,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:51,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:17:51,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:51,390 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:51,741 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-01-31 21:17:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:17:51,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 21:17:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:51,744 INFO L225 Difference]: With dead ends: 26 [2022-01-31 21:17:51,744 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 21:17:51,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:17:51,745 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:51,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 21:17:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 21:17:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-01-31 21:17:51,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2022-01-31 21:17:51,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:51,751 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-01-31 21:17:51,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:51,751 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-01-31 21:17:51,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 21:17:51,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:51,752 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:51,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:17:51,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1511837057, now seen corresponding path program 1 times [2022-01-31 21:17:51,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:51,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391437902] [2022-01-31 21:17:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:51,754 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:51,754 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:51,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:51,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:51,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:51,801 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:51,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391437902] [2022-01-31 21:17:51,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [391437902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:51,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:51,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:17:51,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353573018] [2022-01-31 21:17:51,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:51,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 21:17:51,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 21:17:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:17:51,803 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:51,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:51,872 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-01-31 21:17:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 21:17:51,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 21:17:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:51,873 INFO L225 Difference]: With dead ends: 34 [2022-01-31 21:17:51,873 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 21:17:51,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:17:51,874 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:51,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 21:17:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2022-01-31 21:17:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-01-31 21:17:51,883 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2022-01-31 21:17:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:51,883 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-01-31 21:17:51,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-01-31 21:17:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 21:17:51,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:51,884 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:51,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:17:51,884 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash 416888065, now seen corresponding path program 2 times [2022-01-31 21:17:51,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:51,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017884552] [2022-01-31 21:17:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:51,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:51,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:51,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:51,888 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:51,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:51,937 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 21:17:51,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:51,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017884552] [2022-01-31 21:17:51,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017884552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:51,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:51,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:17:51,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757961877] [2022-01-31 21:17:51,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:51,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 21:17:51,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:51,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 21:17:51,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:17:51,939 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:52,009 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-01-31 21:17:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 21:17:52,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 21:17:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:52,013 INFO L225 Difference]: With dead ends: 35 [2022-01-31 21:17:52,015 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 21:17:52,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:17:52,022 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:52,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 21:17:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-01-31 21:17:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-01-31 21:17:52,029 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2022-01-31 21:17:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:52,029 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-01-31 21:17:52,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-01-31 21:17:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 21:17:52,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:52,030 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:52,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 21:17:52,030 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:52,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1379700060, now seen corresponding path program 3 times [2022-01-31 21:17:52,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:52,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333648656] [2022-01-31 21:17:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:52,039 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:52,039 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:52,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:52,042 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,108 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 21:17:52,109 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:52,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333648656] [2022-01-31 21:17:52,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333648656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:52,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:52,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 21:17:52,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454304951] [2022-01-31 21:17:52,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:52,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 21:17:52,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:52,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 21:17:52,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 21:17:52,110 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:52,199 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-01-31 21:17:52,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:17:52,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 21:17:52,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:52,200 INFO L225 Difference]: With dead ends: 40 [2022-01-31 21:17:52,200 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 21:17:52,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:52,202 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:52,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 17 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 21:17:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-31 21:17:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-01-31 21:17:52,219 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2022-01-31 21:17:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:52,220 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-01-31 21:17:52,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-01-31 21:17:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 21:17:52,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:52,221 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:52,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 21:17:52,222 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1820318244, now seen corresponding path program 4 times [2022-01-31 21:17:52,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:52,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037105820] [2022-01-31 21:17:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:52,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:52,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:52,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:52,225 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:52,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:52,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037105820] [2022-01-31 21:17:52,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037105820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:52,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:52,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 21:17:52,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523635789] [2022-01-31 21:17:52,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:52,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 21:17:52,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:52,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 21:17:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 21:17:52,282 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:52,370 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-01-31 21:17:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:17:52,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 21:17:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:52,371 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:17:52,371 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 21:17:52,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:52,372 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:52,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 19 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 21:17:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-01-31 21:17:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-01-31 21:17:52,381 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 18 [2022-01-31 21:17:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:52,381 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-01-31 21:17:52,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-01-31 21:17:52,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 21:17:52,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:52,382 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:52,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 21:17:52,382 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:52,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:52,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1841324452, now seen corresponding path program 5 times [2022-01-31 21:17:52,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:52,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527915316] [2022-01-31 21:17:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:52,384 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:52,384 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:52,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:52,385 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,427 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 21:17:52,427 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527915316] [2022-01-31 21:17:52,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [527915316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:52,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:52,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 21:17:52,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617297048] [2022-01-31 21:17:52,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:52,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 21:17:52,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 21:17:52,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 21:17:52,428 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:52,509 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-01-31 21:17:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:17:52,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 21:17:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:52,510 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:17:52,510 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 21:17:52,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:52,510 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:52,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 19 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 21:17:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-01-31 21:17:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-01-31 21:17:52,518 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 18 [2022-01-31 21:17:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:52,518 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-01-31 21:17:52,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-01-31 21:17:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 21:17:52,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:52,519 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:52,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 21:17:52,519 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1303028985, now seen corresponding path program 6 times [2022-01-31 21:17:52,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:52,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592417190] [2022-01-31 21:17:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:52,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:52,521 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:52,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:52,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:52,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:52,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592417190] [2022-01-31 21:17:52,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592417190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:52,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:52,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 21:17:52,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330547447] [2022-01-31 21:17:52,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:52,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:17:52,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:17:52,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:17:52,566 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:52,657 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-01-31 21:17:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 21:17:52,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 21:17:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:52,658 INFO L225 Difference]: With dead ends: 46 [2022-01-31 21:17:52,658 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 21:17:52,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:17:52,659 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:52,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 21:17:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-01-31 21:17:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-01-31 21:17:52,668 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 20 [2022-01-31 21:17:52,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:52,668 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-01-31 21:17:52,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-01-31 21:17:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 21:17:52,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:52,668 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:52,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 21:17:52,669 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:52,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:52,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1896989319, now seen corresponding path program 7 times [2022-01-31 21:17:52,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:52,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865975907] [2022-01-31 21:17:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:52,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:52,671 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:52,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:52,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:52,714 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:52,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865975907] [2022-01-31 21:17:52,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [865975907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:52,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:52,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 21:17:52,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610147287] [2022-01-31 21:17:52,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:52,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:17:52,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:52,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:17:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:17:52,716 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:52,799 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-01-31 21:17:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 21:17:52,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 21:17:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:52,800 INFO L225 Difference]: With dead ends: 50 [2022-01-31 21:17:52,800 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 21:17:52,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:17:52,801 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:52,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:52,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 21:17:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-01-31 21:17:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-01-31 21:17:52,810 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 20 [2022-01-31 21:17:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:52,810 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-01-31 21:17:52,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-01-31 21:17:52,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 21:17:52,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:52,811 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:52,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 21:17:52,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:52,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1917995527, now seen corresponding path program 8 times [2022-01-31 21:17:52,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:52,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827854528] [2022-01-31 21:17:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:52,813 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:52,813 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:52,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:52,814 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:52,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:52,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827854528] [2022-01-31 21:17:52,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [827854528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:52,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:52,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 21:17:52,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733249488] [2022-01-31 21:17:52,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:52,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:17:52,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:52,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:17:52,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:17:52,861 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:52,952 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-01-31 21:17:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 21:17:52,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 21:17:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:52,953 INFO L225 Difference]: With dead ends: 56 [2022-01-31 21:17:52,953 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 21:17:52,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:17:52,953 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:52,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 21:17:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-01-31 21:17:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-01-31 21:17:52,982 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 20 [2022-01-31 21:17:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:52,982 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-01-31 21:17:52,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-01-31 21:17:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 21:17:52,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:52,983 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:52,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 21:17:52,983 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:52,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:52,984 INFO L85 PathProgramCache]: Analyzing trace with hash 630124935, now seen corresponding path program 9 times [2022-01-31 21:17:52,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:52,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737663326] [2022-01-31 21:17:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:52,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:52,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:52,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:52,986 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,027 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 21:17:53,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:53,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737663326] [2022-01-31 21:17:53,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1737663326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:53,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:53,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 21:17:53,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113468362] [2022-01-31 21:17:53,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:53,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:17:53,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:53,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:17:53,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:17:53,029 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:53,115 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-01-31 21:17:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 21:17:53,115 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 21:17:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:53,116 INFO L225 Difference]: With dead ends: 54 [2022-01-31 21:17:53,116 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 21:17:53,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:17:53,117 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:53,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 21:17:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2022-01-31 21:17:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-01-31 21:17:53,130 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 20 [2022-01-31 21:17:53,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:53,130 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-01-31 21:17:53,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-01-31 21:17:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:17:53,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:53,131 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:53,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 21:17:53,131 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash -636569942, now seen corresponding path program 10 times [2022-01-31 21:17:53,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:53,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790879354] [2022-01-31 21:17:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:53,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:53,133 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:53,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:53,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:53,202 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:53,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790879354] [2022-01-31 21:17:53,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [790879354] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:53,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:53,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:17:53,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966042556] [2022-01-31 21:17:53,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:53,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:17:53,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:53,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:17:53,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:17:53,204 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:53,309 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-01-31 21:17:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:17:53,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:17:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:53,309 INFO L225 Difference]: With dead ends: 52 [2022-01-31 21:17:53,309 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 21:17:53,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:17:53,310 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:53,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 21:17:53,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-01-31 21:17:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-01-31 21:17:53,328 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 22 [2022-01-31 21:17:53,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:53,328 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-01-31 21:17:53,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-01-31 21:17:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:17:53,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:53,332 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:53,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 21:17:53,332 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:53,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1731518934, now seen corresponding path program 11 times [2022-01-31 21:17:53,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:53,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78029273] [2022-01-31 21:17:53,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:53,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:53,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:53,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:53,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:53,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:53,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78029273] [2022-01-31 21:17:53,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [78029273] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:53,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:53,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:17:53,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243251405] [2022-01-31 21:17:53,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:53,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:17:53,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:53,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:17:53,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:17:53,394 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:53,491 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-01-31 21:17:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:17:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:17:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:53,492 INFO L225 Difference]: With dead ends: 56 [2022-01-31 21:17:53,492 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 21:17:53,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:17:53,492 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:53,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 17 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 21:17:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-01-31 21:17:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2022-01-31 21:17:53,505 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 22 [2022-01-31 21:17:53,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:53,505 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2022-01-31 21:17:53,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,505 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2022-01-31 21:17:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:17:53,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:53,506 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:53,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 21:17:53,506 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:53,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1710512726, now seen corresponding path program 12 times [2022-01-31 21:17:53,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:53,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103689648] [2022-01-31 21:17:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:53,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:53,509 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:53,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:53,510 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:53,567 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103689648] [2022-01-31 21:17:53,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1103689648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:53,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:53,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:17:53,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374686687] [2022-01-31 21:17:53,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:53,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:17:53,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:53,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:17:53,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:17:53,569 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:53,676 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2022-01-31 21:17:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:17:53,677 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:17:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:53,678 INFO L225 Difference]: With dead ends: 62 [2022-01-31 21:17:53,678 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 21:17:53,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:17:53,680 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:53,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 21:17:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2022-01-31 21:17:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-01-31 21:17:53,709 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 22 [2022-01-31 21:17:53,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:53,710 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-01-31 21:17:53,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-01-31 21:17:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:17:53,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:53,710 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:53,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 21:17:53,710 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:53,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:53,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1296583978, now seen corresponding path program 13 times [2022-01-31 21:17:53,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:53,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387279268] [2022-01-31 21:17:53,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:53,712 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:53,712 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:53,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:53,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:53,759 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:53,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387279268] [2022-01-31 21:17:53,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [387279268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:53,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:53,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:17:53,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305406655] [2022-01-31 21:17:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:53,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:17:53,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:53,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:17:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:17:53,761 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:53,861 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-01-31 21:17:53,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:17:53,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:17:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:53,862 INFO L225 Difference]: With dead ends: 68 [2022-01-31 21:17:53,862 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 21:17:53,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:17:53,863 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:53,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 21:17:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2022-01-31 21:17:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-01-31 21:17:53,873 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 22 [2022-01-31 21:17:53,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:53,873 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-01-31 21:17:53,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-01-31 21:17:53,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:17:53,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:53,873 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:53,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 21:17:53,874 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:53,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:53,874 INFO L85 PathProgramCache]: Analyzing trace with hash 603526314, now seen corresponding path program 14 times [2022-01-31 21:17:53,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:53,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871533939] [2022-01-31 21:17:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:53,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:53,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:53,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:53,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:53,921 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 21:17:53,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:53,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871533939] [2022-01-31 21:17:53,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1871533939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:53,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:53,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:17:53,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808628198] [2022-01-31 21:17:53,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:53,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:17:53,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:53,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:17:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:17:53,923 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:54,047 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2022-01-31 21:17:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:17:54,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:17:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:54,047 INFO L225 Difference]: With dead ends: 64 [2022-01-31 21:17:54,048 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 21:17:54,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:17:54,048 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:54,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 21:17:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2022-01-31 21:17:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2022-01-31 21:17:54,057 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 22 [2022-01-31 21:17:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:54,057 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2022-01-31 21:17:54,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2022-01-31 21:17:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 21:17:54,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:54,058 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:54,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 21:17:54,058 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash -119556723, now seen corresponding path program 15 times [2022-01-31 21:17:54,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:54,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066577626] [2022-01-31 21:17:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:54,060 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:54,060 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:54,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:54,061 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:54,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:54,121 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:54,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066577626] [2022-01-31 21:17:54,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066577626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:54,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:54,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:17:54,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117010570] [2022-01-31 21:17:54,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:54,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:17:54,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:54,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:17:54,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:17:54,122 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:54,254 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-01-31 21:17:54,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:17:54,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 21:17:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:54,255 INFO L225 Difference]: With dead ends: 58 [2022-01-31 21:17:54,255 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 21:17:54,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:17:54,256 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:54,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 21:17:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-01-31 21:17:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-01-31 21:17:54,265 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 24 [2022-01-31 21:17:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:54,265 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-01-31 21:17:54,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,265 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-01-31 21:17:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 21:17:54,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:54,266 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:54,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 21:17:54,266 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:54,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1214505715, now seen corresponding path program 16 times [2022-01-31 21:17:54,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:54,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749146099] [2022-01-31 21:17:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:54,268 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:54,268 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:54,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:54,268 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:54,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:54,328 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:54,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749146099] [2022-01-31 21:17:54,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [749146099] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:54,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:54,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:17:54,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260702193] [2022-01-31 21:17:54,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:54,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:17:54,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:17:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:17:54,329 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:54,474 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2022-01-31 21:17:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:17:54,474 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 21:17:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:54,474 INFO L225 Difference]: With dead ends: 62 [2022-01-31 21:17:54,475 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 21:17:54,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:17:54,475 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:54,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 21:17:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-01-31 21:17:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-01-31 21:17:54,489 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 24 [2022-01-31 21:17:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:54,489 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-01-31 21:17:54,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,489 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-01-31 21:17:54,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 21:17:54,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:54,490 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:54,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 21:17:54,490 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:54,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:54,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1193499507, now seen corresponding path program 17 times [2022-01-31 21:17:54,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:54,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416059694] [2022-01-31 21:17:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:54,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:54,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:54,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:54,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:54,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:54,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:54,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416059694] [2022-01-31 21:17:54,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1416059694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:54,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:54,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:17:54,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807799221] [2022-01-31 21:17:54,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:54,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:17:54,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:17:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:17:54,556 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:54,700 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-01-31 21:17:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:17:54,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 21:17:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:54,701 INFO L225 Difference]: With dead ends: 68 [2022-01-31 21:17:54,701 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 21:17:54,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:17:54,701 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:54,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 21:17:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-01-31 21:17:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-01-31 21:17:54,712 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 24 [2022-01-31 21:17:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:54,712 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-01-31 21:17:54,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-01-31 21:17:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 21:17:54,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:54,713 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:54,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 21:17:54,713 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:54,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1813597197, now seen corresponding path program 18 times [2022-01-31 21:17:54,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:54,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557059593] [2022-01-31 21:17:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:54,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:54,714 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:54,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:54,715 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:54,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:54,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:54,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557059593] [2022-01-31 21:17:54,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [557059593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:54,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:54,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:17:54,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250000664] [2022-01-31 21:17:54,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:54,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:17:54,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:54,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:17:54,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:17:54,776 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:54,912 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-01-31 21:17:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:17:54,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 21:17:54,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:54,913 INFO L225 Difference]: With dead ends: 74 [2022-01-31 21:17:54,913 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 21:17:54,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:17:54,914 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:54,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 23 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 21:17:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2022-01-31 21:17:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2022-01-31 21:17:54,924 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 24 [2022-01-31 21:17:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:54,925 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2022-01-31 21:17:54,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2022-01-31 21:17:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 21:17:54,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:54,925 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:54,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 21:17:54,925 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:54,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1120539533, now seen corresponding path program 19 times [2022-01-31 21:17:54,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:54,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109785567] [2022-01-31 21:17:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:54,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:54,927 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:54,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:54,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:54,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:54,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:54,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109785567] [2022-01-31 21:17:54,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [109785567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:54,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:54,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:17:54,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566509180] [2022-01-31 21:17:54,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:54,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:17:54,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:54,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:17:54,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:17:54,989 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:55,122 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-01-31 21:17:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:17:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 21:17:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:55,123 INFO L225 Difference]: With dead ends: 80 [2022-01-31 21:17:55,123 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 21:17:55,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:17:55,124 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:55,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 17 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 21:17:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2022-01-31 21:17:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-01-31 21:17:55,134 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 24 [2022-01-31 21:17:55,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:55,134 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-01-31 21:17:55,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-01-31 21:17:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 21:17:55,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:55,135 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:55,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 21:17:55,135 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash 812055309, now seen corresponding path program 20 times [2022-01-31 21:17:55,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583219422] [2022-01-31 21:17:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:55,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:55,137 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:55,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:55,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:55,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:55,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:55,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583219422] [2022-01-31 21:17:55,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583219422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:55,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:55,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:17:55,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964987371] [2022-01-31 21:17:55,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:55,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:17:55,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:55,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:17:55,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:17:55,210 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:55,340 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-01-31 21:17:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:17:55,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 21:17:55,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:55,341 INFO L225 Difference]: With dead ends: 74 [2022-01-31 21:17:55,341 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 21:17:55,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:17:55,341 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:55,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 21:17:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2022-01-31 21:17:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-01-31 21:17:55,351 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 24 [2022-01-31 21:17:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:55,351 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-01-31 21:17:55,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-01-31 21:17:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:17:55,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:55,351 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:55,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 21:17:55,351 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:55,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1486059600, now seen corresponding path program 21 times [2022-01-31 21:17:55,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:55,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526064475] [2022-01-31 21:17:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:55,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:55,353 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:55,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:55,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:55,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:55,434 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 21:17:55,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:55,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526064475] [2022-01-31 21:17:55,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1526064475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:55,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:55,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:17:55,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463422318] [2022-01-31 21:17:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:55,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:17:55,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:55,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:17:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:17:55,435 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:55,575 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2022-01-31 21:17:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:17:55,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:17:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:55,576 INFO L225 Difference]: With dead ends: 64 [2022-01-31 21:17:55,576 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 21:17:55,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:17:55,577 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:55,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 19 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 21:17:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-01-31 21:17:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-01-31 21:17:55,587 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 26 [2022-01-31 21:17:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:55,587 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-01-31 21:17:55,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-01-31 21:17:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:17:55,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:55,588 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:55,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 21:17:55,588 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1713958704, now seen corresponding path program 22 times [2022-01-31 21:17:55,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:55,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311066806] [2022-01-31 21:17:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:55,591 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:55,591 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:55,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:55,592 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:55,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:55,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:55,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311066806] [2022-01-31 21:17:55,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1311066806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:55,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:55,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:17:55,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806535605] [2022-01-31 21:17:55,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:55,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:17:55,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:55,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:17:55,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:17:55,669 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:55,809 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-01-31 21:17:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:17:55,810 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:17:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:55,810 INFO L225 Difference]: With dead ends: 68 [2022-01-31 21:17:55,810 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 21:17:55,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:17:55,811 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:55,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:55,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 21:17:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-01-31 21:17:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-01-31 21:17:55,822 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 26 [2022-01-31 21:17:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:55,822 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-01-31 21:17:55,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-01-31 21:17:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:17:55,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:55,823 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:55,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 21:17:55,823 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:55,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1734964912, now seen corresponding path program 23 times [2022-01-31 21:17:55,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:55,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731737016] [2022-01-31 21:17:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:55,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:55,825 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:55,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:55,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:55,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:55,888 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:55,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731737016] [2022-01-31 21:17:55,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [731737016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:55,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:55,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:17:55,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704487075] [2022-01-31 21:17:55,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:55,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:17:55,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:55,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:17:55,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:17:55,889 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:56,047 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-01-31 21:17:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:17:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:17:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:56,048 INFO L225 Difference]: With dead ends: 74 [2022-01-31 21:17:56,048 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 21:17:56,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:17:56,049 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:56,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 21:17:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2022-01-31 21:17:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2022-01-31 21:17:56,063 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 26 [2022-01-31 21:17:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:56,063 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2022-01-31 21:17:56,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2022-01-31 21:17:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:17:56,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:56,063 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:56,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 21:17:56,064 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:56,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash 447094320, now seen corresponding path program 24 times [2022-01-31 21:17:56,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:56,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805955282] [2022-01-31 21:17:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:56,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:56,065 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:56,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:56,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:56,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:56,138 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:56,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805955282] [2022-01-31 21:17:56,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [805955282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:56,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:56,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:17:56,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909580173] [2022-01-31 21:17:56,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:56,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:17:56,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:17:56,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:17:56,140 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:56,277 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-01-31 21:17:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:17:56,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:17:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:56,278 INFO L225 Difference]: With dead ends: 80 [2022-01-31 21:17:56,278 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 21:17:56,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:17:56,278 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:56,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 21:17:56,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2022-01-31 21:17:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2022-01-31 21:17:56,290 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 26 [2022-01-31 21:17:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:56,291 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2022-01-31 21:17:56,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,291 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2022-01-31 21:17:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:17:56,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:56,291 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:56,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 21:17:56,291 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:56,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:56,291 INFO L85 PathProgramCache]: Analyzing trace with hash -245963344, now seen corresponding path program 25 times [2022-01-31 21:17:56,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:56,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470463316] [2022-01-31 21:17:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:56,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:56,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:56,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:56,293 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:56,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:56,362 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:56,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470463316] [2022-01-31 21:17:56,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470463316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:56,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:56,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:17:56,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118812638] [2022-01-31 21:17:56,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:56,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:17:56,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:56,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:17:56,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:17:56,363 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:56,517 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-01-31 21:17:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:17:56,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:17:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:56,518 INFO L225 Difference]: With dead ends: 86 [2022-01-31 21:17:56,518 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 21:17:56,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:17:56,519 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:56,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 21:17:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2022-01-31 21:17:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-01-31 21:17:56,531 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 26 [2022-01-31 21:17:56,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:56,531 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-01-31 21:17:56,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-01-31 21:17:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:17:56,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:56,532 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:56,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 21:17:56,532 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:56,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:56,532 INFO L85 PathProgramCache]: Analyzing trace with hash -554447568, now seen corresponding path program 26 times [2022-01-31 21:17:56,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:56,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43121375] [2022-01-31 21:17:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:56,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:56,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:56,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:56,534 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:56,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:56,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:56,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43121375] [2022-01-31 21:17:56,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [43121375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:56,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:56,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:17:56,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121754445] [2022-01-31 21:17:56,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:56,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:17:56,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:17:56,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:17:56,582 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:56,692 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-01-31 21:17:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:17:56,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:17:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:56,693 INFO L225 Difference]: With dead ends: 92 [2022-01-31 21:17:56,693 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 21:17:56,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:17:56,693 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:56,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:56,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 21:17:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2022-01-31 21:17:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-01-31 21:17:56,706 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 26 [2022-01-31 21:17:56,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:56,706 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-01-31 21:17:56,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-01-31 21:17:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:17:56,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:56,707 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:56,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 21:17:56,723 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash -655043408, now seen corresponding path program 27 times [2022-01-31 21:17:56,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:56,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324384] [2022-01-31 21:17:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:56,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:56,725 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:56,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:56,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:56,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:56,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:56,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324384] [2022-01-31 21:17:56,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [324384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:56,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:56,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:17:56,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285982565] [2022-01-31 21:17:56,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:56,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:17:56,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:56,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:17:56,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:17:56,772 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:56,876 INFO L93 Difference]: Finished difference Result 84 states and 116 transitions. [2022-01-31 21:17:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:17:56,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:17:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:56,876 INFO L225 Difference]: With dead ends: 84 [2022-01-31 21:17:56,876 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 21:17:56,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:17:56,877 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:56,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 21 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 21:17:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2022-01-31 21:17:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2022-01-31 21:17:56,888 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 26 [2022-01-31 21:17:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:56,889 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2022-01-31 21:17:56,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2022-01-31 21:17:56,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:17:56,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:56,889 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:56,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 21:17:56,889 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:56,890 INFO L85 PathProgramCache]: Analyzing trace with hash -435331821, now seen corresponding path program 28 times [2022-01-31 21:17:56,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:56,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066127097] [2022-01-31 21:17:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:56,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:56,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:56,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:56,891 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:56,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:56,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066127097] [2022-01-31 21:17:56,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066127097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:56,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:56,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:17:56,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669321467] [2022-01-31 21:17:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:56,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:17:56,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:17:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:56,977 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:57,149 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2022-01-31 21:17:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:17:57,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:17:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:57,150 INFO L225 Difference]: With dead ends: 70 [2022-01-31 21:17:57,150 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 21:17:57,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:17:57,151 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:57,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 23 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 21:17:57,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-01-31 21:17:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2022-01-31 21:17:57,164 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 28 [2022-01-31 21:17:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:57,164 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2022-01-31 21:17:57,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2022-01-31 21:17:57,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:17:57,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:57,164 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:57,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 21:17:57,164 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:57,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1530280813, now seen corresponding path program 29 times [2022-01-31 21:17:57,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:57,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733924776] [2022-01-31 21:17:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:57,166 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:57,166 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:57,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:57,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:57,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:57,219 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:57,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733924776] [2022-01-31 21:17:57,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1733924776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:57,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:57,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:17:57,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082201011] [2022-01-31 21:17:57,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:57,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:17:57,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:57,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:17:57,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:57,220 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:57,373 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-01-31 21:17:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:17:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:17:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:57,374 INFO L225 Difference]: With dead ends: 74 [2022-01-31 21:17:57,374 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 21:17:57,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:17:57,375 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:57,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 15 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 21:17:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-01-31 21:17:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-01-31 21:17:57,396 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 28 [2022-01-31 21:17:57,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:57,396 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-01-31 21:17:57,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,396 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-01-31 21:17:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:17:57,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:57,396 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:57,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 21:17:57,397 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1509274605, now seen corresponding path program 30 times [2022-01-31 21:17:57,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:57,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893634839] [2022-01-31 21:17:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:57,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:57,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:57,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:57,400 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:57,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:57,469 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:57,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893634839] [2022-01-31 21:17:57,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [893634839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:57,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:57,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:17:57,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486469218] [2022-01-31 21:17:57,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:57,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:17:57,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:17:57,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:57,470 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:57,640 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-01-31 21:17:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:17:57,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:17:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:57,641 INFO L225 Difference]: With dead ends: 80 [2022-01-31 21:17:57,641 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 21:17:57,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:17:57,641 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:57,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 21:17:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2022-01-31 21:17:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-01-31 21:17:57,656 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 28 [2022-01-31 21:17:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:57,656 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-01-31 21:17:57,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-01-31 21:17:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:17:57,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:57,657 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:57,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 21:17:57,657 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1497822099, now seen corresponding path program 31 times [2022-01-31 21:17:57,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:57,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771118978] [2022-01-31 21:17:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:57,658 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:57,658 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:57,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:57,659 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:57,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:57,728 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 21:17:57,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:57,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771118978] [2022-01-31 21:17:57,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771118978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:57,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:57,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:17:57,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290831212] [2022-01-31 21:17:57,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:57,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:17:57,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:57,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:17:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:57,729 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:57,916 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-01-31 21:17:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:17:57,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:17:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:57,917 INFO L225 Difference]: With dead ends: 86 [2022-01-31 21:17:57,917 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 21:17:57,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:17:57,918 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:57,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 21:17:57,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2022-01-31 21:17:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2022-01-31 21:17:57,933 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 28 [2022-01-31 21:17:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:57,933 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2022-01-31 21:17:57,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2022-01-31 21:17:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:17:57,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:57,933 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:57,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 21:17:57,933 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash 804764435, now seen corresponding path program 32 times [2022-01-31 21:17:57,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:57,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296819902] [2022-01-31 21:17:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:57,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:57,935 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:57,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:57,936 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:58,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:58,004 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 21:17:58,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:58,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296819902] [2022-01-31 21:17:58,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296819902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:58,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:58,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:17:58,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494886022] [2022-01-31 21:17:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:58,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:17:58,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:17:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:58,005 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:58,188 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-01-31 21:17:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:17:58,188 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:17:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:58,188 INFO L225 Difference]: With dead ends: 92 [2022-01-31 21:17:58,188 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 21:17:58,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:17:58,189 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:58,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:58,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 21:17:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2022-01-31 21:17:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2022-01-31 21:17:58,204 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 28 [2022-01-31 21:17:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:58,204 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2022-01-31 21:17:58,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2022-01-31 21:17:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:17:58,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:58,205 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:58,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 21:17:58,205 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:58,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:58,205 INFO L85 PathProgramCache]: Analyzing trace with hash 496280211, now seen corresponding path program 33 times [2022-01-31 21:17:58,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:58,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915194081] [2022-01-31 21:17:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:58,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:58,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:58,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:58,207 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:58,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:58,274 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 21:17:58,274 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:58,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915194081] [2022-01-31 21:17:58,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1915194081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:58,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:58,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:17:58,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632580673] [2022-01-31 21:17:58,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:58,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:17:58,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:58,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:17:58,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:58,275 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:58,445 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-01-31 21:17:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:17:58,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:17:58,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:58,445 INFO L225 Difference]: With dead ends: 98 [2022-01-31 21:17:58,445 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 21:17:58,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:17:58,446 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:58,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:58,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 21:17:58,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2022-01-31 21:17:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-01-31 21:17:58,462 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 28 [2022-01-31 21:17:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:58,463 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-01-31 21:17:58,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-01-31 21:17:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:17:58,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:58,463 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:58,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 21:17:58,463 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:58,463 INFO L85 PathProgramCache]: Analyzing trace with hash 395684371, now seen corresponding path program 34 times [2022-01-31 21:17:58,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:58,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475761192] [2022-01-31 21:17:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:58,465 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:58,465 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:58,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:58,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:58,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:58,533 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:58,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475761192] [2022-01-31 21:17:58,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [475761192] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:58,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:58,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:17:58,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533334678] [2022-01-31 21:17:58,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:58,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:17:58,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:58,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:17:58,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:58,534 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:58,708 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-01-31 21:17:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:17:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:17:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:58,709 INFO L225 Difference]: With dead ends: 104 [2022-01-31 21:17:58,709 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 21:17:58,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:17:58,709 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:58,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 21:17:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2022-01-31 21:17:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2022-01-31 21:17:58,726 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 28 [2022-01-31 21:17:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:58,726 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2022-01-31 21:17:58,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2022-01-31 21:17:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:17:58,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:58,726 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:58,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 21:17:58,726 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:58,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1787637357, now seen corresponding path program 35 times [2022-01-31 21:17:58,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:58,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261869660] [2022-01-31 21:17:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:58,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:58,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:58,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:58,729 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:58,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:58,795 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:58,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261869660] [2022-01-31 21:17:58,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [261869660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:58,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:58,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:17:58,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791827875] [2022-01-31 21:17:58,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:58,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:17:58,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:58,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:17:58,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:17:58,796 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:58,980 INFO L93 Difference]: Finished difference Result 94 states and 131 transitions. [2022-01-31 21:17:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:17:58,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:17:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:58,981 INFO L225 Difference]: With dead ends: 94 [2022-01-31 21:17:58,981 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 21:17:58,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:17:58,981 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:58,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 15 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 21:17:58,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2022-01-31 21:17:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2022-01-31 21:17:58,995 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 28 [2022-01-31 21:17:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:58,995 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2022-01-31 21:17:58,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2022-01-31 21:17:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:17:58,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:58,996 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:58,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 21:17:58,996 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:58,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:58,996 INFO L85 PathProgramCache]: Analyzing trace with hash -3250762, now seen corresponding path program 36 times [2022-01-31 21:17:58,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:58,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125461252] [2022-01-31 21:17:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:58,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:58,997 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:58,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:58,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:59,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:59,075 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:59,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125461252] [2022-01-31 21:17:59,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125461252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:59,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:59,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:17:59,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673999670] [2022-01-31 21:17:59,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:59,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:17:59,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:59,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:17:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:17:59,076 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:59,267 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2022-01-31 21:17:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:17:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:17:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:59,269 INFO L225 Difference]: With dead ends: 76 [2022-01-31 21:17:59,270 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 21:17:59,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:17:59,271 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:59,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 21 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 21:17:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-01-31 21:17:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-01-31 21:17:59,288 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 30 [2022-01-31 21:17:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:59,289 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-01-31 21:17:59,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-01-31 21:17:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:17:59,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:59,290 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:59,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 21:17:59,290 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:59,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:59,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1098199754, now seen corresponding path program 37 times [2022-01-31 21:17:59,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:59,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206055484] [2022-01-31 21:17:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:59,291 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:59,291 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:59,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:59,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:59,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:59,371 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:59,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206055484] [2022-01-31 21:17:59,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [206055484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:59,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:59,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:17:59,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584272604] [2022-01-31 21:17:59,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:59,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:17:59,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:17:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:17:59,372 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:59,500 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-01-31 21:17:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:17:59,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:17:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:59,500 INFO L225 Difference]: With dead ends: 80 [2022-01-31 21:17:59,500 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 21:17:59,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:17:59,501 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:59,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 17 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:17:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 21:17:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-01-31 21:17:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2022-01-31 21:17:59,531 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 30 [2022-01-31 21:17:59,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:59,532 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2022-01-31 21:17:59,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2022-01-31 21:17:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:17:59,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:59,532 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:59,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 21:17:59,532 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1077193546, now seen corresponding path program 38 times [2022-01-31 21:17:59,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:59,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280014095] [2022-01-31 21:17:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:59,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:59,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:59,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:59,534 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:59,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:59,627 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 21:17:59,627 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280014095] [2022-01-31 21:17:59,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [280014095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:59,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:59,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:17:59,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701873398] [2022-01-31 21:17:59,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:59,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:17:59,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:59,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:17:59,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:17:59,629 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:59,839 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-01-31 21:17:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:17:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:17:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:59,841 INFO L225 Difference]: With dead ends: 86 [2022-01-31 21:17:59,841 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 21:17:59,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:17:59,842 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:59,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:17:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 21:17:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2022-01-31 21:17:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-01-31 21:17:59,862 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 30 [2022-01-31 21:17:59,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:59,862 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-01-31 21:17:59,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:59,862 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-01-31 21:17:59,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:17:59,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:59,862 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:59,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 21:17:59,863 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:59,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1929903158, now seen corresponding path program 39 times [2022-01-31 21:17:59,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:59,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914711321] [2022-01-31 21:17:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:59,864 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:17:59,864 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:17:59,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:59,868 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:17:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:59,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:59,954 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 21:17:59,954 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:59,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914711321] [2022-01-31 21:17:59,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [914711321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:59,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:59,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:17:59,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536230963] [2022-01-31 21:17:59,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:59,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:17:59,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:17:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:17:59,955 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:00,135 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-01-31 21:18:00,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:18:00,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:18:00,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:00,135 INFO L225 Difference]: With dead ends: 92 [2022-01-31 21:18:00,135 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 21:18:00,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:18:00,136 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:00,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 21:18:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2022-01-31 21:18:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2022-01-31 21:18:00,155 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 30 [2022-01-31 21:18:00,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:00,155 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2022-01-31 21:18:00,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:00,155 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2022-01-31 21:18:00,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:18:00,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:00,156 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:00,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 21:18:00,156 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:00,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1236845494, now seen corresponding path program 40 times [2022-01-31 21:18:00,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:00,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104646774] [2022-01-31 21:18:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:00,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:00,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:00,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:00,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:00,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:00,240 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:00,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104646774] [2022-01-31 21:18:00,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [104646774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:00,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:00,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:18:00,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807011337] [2022-01-31 21:18:00,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:00,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:18:00,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:18:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:18:00,241 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:00,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:00,438 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-01-31 21:18:00,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:18:00,438 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:18:00,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:00,438 INFO L225 Difference]: With dead ends: 98 [2022-01-31 21:18:00,438 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 21:18:00,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:18:00,442 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:00,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 21 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 21:18:00,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2022-01-31 21:18:00,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.457142857142857) internal successors, (102), 70 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2022-01-31 21:18:00,494 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 30 [2022-01-31 21:18:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:00,494 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2022-01-31 21:18:00,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2022-01-31 21:18:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:18:00,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:00,495 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:00,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 21:18:00,495 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:00,496 INFO L85 PathProgramCache]: Analyzing trace with hash 928361270, now seen corresponding path program 41 times [2022-01-31 21:18:00,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:00,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77035400] [2022-01-31 21:18:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:00,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:00,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:00,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:00,498 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:00,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:00,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77035400] [2022-01-31 21:18:00,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [77035400] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:00,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:00,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:18:00,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488257870] [2022-01-31 21:18:00,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:00,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:18:00,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:00,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:18:00,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:18:00,653 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:00,864 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-01-31 21:18:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:18:00,864 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:18:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:00,865 INFO L225 Difference]: With dead ends: 104 [2022-01-31 21:18:00,865 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 21:18:00,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:18:00,866 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:00,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 21:18:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 77. [2022-01-31 21:18:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-01-31 21:18:00,888 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 30 [2022-01-31 21:18:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:00,888 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-01-31 21:18:00,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-01-31 21:18:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:18:00,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:00,888 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:00,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 21:18:00,889 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash 827765430, now seen corresponding path program 42 times [2022-01-31 21:18:00,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:00,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893504932] [2022-01-31 21:18:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:00,890 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:00,890 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:00,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:00,891 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:00,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:00,978 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:00,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893504932] [2022-01-31 21:18:00,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1893504932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:00,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:00,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:18:00,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982991955] [2022-01-31 21:18:00,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:00,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:18:00,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:18:00,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:18:00,979 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:01,169 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-01-31 21:18:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:18:01,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:18:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:01,170 INFO L225 Difference]: With dead ends: 110 [2022-01-31 21:18:01,170 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:18:01,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:18:01,171 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:01,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:18:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2022-01-31 21:18:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-01-31 21:18:01,194 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 30 [2022-01-31 21:18:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:01,194 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-01-31 21:18:01,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-01-31 21:18:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:18:01,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:01,194 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:01,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 21:18:01,195 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:01,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1355556298, now seen corresponding path program 43 times [2022-01-31 21:18:01,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:01,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513519750] [2022-01-31 21:18:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:01,196 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:01,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:01,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:01,197 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:01,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:01,290 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:01,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513519750] [2022-01-31 21:18:01,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1513519750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:01,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:01,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:18:01,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699044521] [2022-01-31 21:18:01,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:01,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:18:01,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:01,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:18:01,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:18:01,291 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:01,503 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-01-31 21:18:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:18:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:18:01,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:01,504 INFO L225 Difference]: With dead ends: 116 [2022-01-31 21:18:01,504 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 21:18:01,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:18:01,505 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:01,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 15 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:18:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 21:18:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2022-01-31 21:18:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2022-01-31 21:18:01,552 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 30 [2022-01-31 21:18:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:01,552 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2022-01-31 21:18:01,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2022-01-31 21:18:01,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:18:01,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:01,553 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:01,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 21:18:01,553 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash 711270838, now seen corresponding path program 44 times [2022-01-31 21:18:01,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:01,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836687403] [2022-01-31 21:18:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:01,555 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:01,555 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:01,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:01,556 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:01,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:01,640 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:01,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836687403] [2022-01-31 21:18:01,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [836687403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:01,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:01,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:18:01,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836375837] [2022-01-31 21:18:01,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:01,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:18:01,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:01,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:18:01,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:18:01,641 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:01,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:01,828 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-01-31 21:18:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:18:01,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:18:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:01,828 INFO L225 Difference]: With dead ends: 104 [2022-01-31 21:18:01,828 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 21:18:01,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:18:01,829 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:01,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 21 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 21:18:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 67. [2022-01-31 21:18:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2022-01-31 21:18:01,846 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 30 [2022-01-31 21:18:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:01,846 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2022-01-31 21:18:01,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2022-01-31 21:18:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:18:01,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:01,847 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:01,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 21:18:01,847 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:01,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1385180775, now seen corresponding path program 45 times [2022-01-31 21:18:01,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:01,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387502837] [2022-01-31 21:18:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:01,848 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:01,848 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:01,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:01,849 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:01,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:01,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:01,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387502837] [2022-01-31 21:18:01,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387502837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:01,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:01,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:18:01,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151302829] [2022-01-31 21:18:01,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:01,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:18:01,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:01,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:18:01,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:18:01,941 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:02,139 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2022-01-31 21:18:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:18:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:18:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:02,139 INFO L225 Difference]: With dead ends: 82 [2022-01-31 21:18:02,139 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 21:18:02,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:18:02,140 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:02,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 17 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 21:18:02,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-01-31 21:18:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-01-31 21:18:02,158 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 32 [2022-01-31 21:18:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:02,158 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-01-31 21:18:02,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-01-31 21:18:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:18:02,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:02,159 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:02,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 21:18:02,159 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:02,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:02,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1814837529, now seen corresponding path program 46 times [2022-01-31 21:18:02,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:02,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041548181] [2022-01-31 21:18:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:02,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:02,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:02,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:02,162 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:02,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:02,268 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 21:18:02,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:02,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041548181] [2022-01-31 21:18:02,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041548181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:02,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:02,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:18:02,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996668000] [2022-01-31 21:18:02,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:02,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:18:02,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:02,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:18:02,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:18:02,269 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:02,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:02,473 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-01-31 21:18:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:18:02,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:18:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:02,474 INFO L225 Difference]: With dead ends: 86 [2022-01-31 21:18:02,474 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 21:18:02,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:18:02,474 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:02,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 21:18:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-01-31 21:18:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.457142857142857) internal successors, (102), 70 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2022-01-31 21:18:02,505 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 32 [2022-01-31 21:18:02,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:02,505 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2022-01-31 21:18:02,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:02,505 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2022-01-31 21:18:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:18:02,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:02,505 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:02,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 21:18:02,507 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:02,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1835843737, now seen corresponding path program 47 times [2022-01-31 21:18:02,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:02,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109789010] [2022-01-31 21:18:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:02,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:02,508 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:02,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:02,509 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:02,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:02,617 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 21:18:02,617 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:02,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109789010] [2022-01-31 21:18:02,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109789010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:02,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:02,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:18:02,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953546094] [2022-01-31 21:18:02,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:02,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:18:02,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:02,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:18:02,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:18:02,618 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:02,842 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-01-31 21:18:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:18:02,842 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:18:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:02,843 INFO L225 Difference]: With dead ends: 92 [2022-01-31 21:18:02,843 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 21:18:02,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:18:02,843 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:02,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 23 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 21:18:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2022-01-31 21:18:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-01-31 21:18:02,864 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 32 [2022-01-31 21:18:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:02,864 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-01-31 21:18:02,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:02,865 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-01-31 21:18:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:18:02,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:02,865 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:02,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 21:18:02,865 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:02,865 INFO L85 PathProgramCache]: Analyzing trace with hash 547973145, now seen corresponding path program 48 times [2022-01-31 21:18:02,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:02,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505891646] [2022-01-31 21:18:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:02,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:02,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:02,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:02,867 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:02,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:02,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:02,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505891646] [2022-01-31 21:18:02,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1505891646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:02,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:02,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:18:02,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119513539] [2022-01-31 21:18:02,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:02,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:18:02,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:02,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:18:02,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:18:02,953 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:03,183 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-01-31 21:18:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:18:03,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:18:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:03,184 INFO L225 Difference]: With dead ends: 98 [2022-01-31 21:18:03,184 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 21:18:03,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:18:03,185 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:03,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:03,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 21:18:03,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2022-01-31 21:18:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-01-31 21:18:03,207 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 32 [2022-01-31 21:18:03,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:03,207 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-01-31 21:18:03,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-01-31 21:18:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:18:03,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:03,207 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:03,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 21:18:03,207 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash -145084519, now seen corresponding path program 49 times [2022-01-31 21:18:03,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:03,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865226646] [2022-01-31 21:18:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:03,209 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:03,209 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:03,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:03,209 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:03,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:03,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:03,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865226646] [2022-01-31 21:18:03,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1865226646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:03,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:03,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:18:03,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149027759] [2022-01-31 21:18:03,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:03,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:18:03,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:03,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:18:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:18:03,300 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:03,530 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-01-31 21:18:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:18:03,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:18:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:03,531 INFO L225 Difference]: With dead ends: 104 [2022-01-31 21:18:03,531 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 21:18:03,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:18:03,533 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:03,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 21 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 21:18:03,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-01-31 21:18:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2022-01-31 21:18:03,560 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 32 [2022-01-31 21:18:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:03,560 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2022-01-31 21:18:03,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2022-01-31 21:18:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:18:03,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:03,564 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:03,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 21:18:03,564 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash -453568743, now seen corresponding path program 50 times [2022-01-31 21:18:03,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:03,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422707899] [2022-01-31 21:18:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:03,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:03,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:03,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:03,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:03,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:03,682 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422707899] [2022-01-31 21:18:03,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [422707899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:03,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:03,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:18:03,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026662341] [2022-01-31 21:18:03,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:03,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:18:03,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:03,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:18:03,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:18:03,683 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:03,891 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-01-31 21:18:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:18:03,891 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:18:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:03,892 INFO L225 Difference]: With dead ends: 110 [2022-01-31 21:18:03,892 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:18:03,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:18:03,892 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:03,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 17 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:18:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2022-01-31 21:18:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:03,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-01-31 21:18:03,916 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 32 [2022-01-31 21:18:03,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:03,916 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-01-31 21:18:03,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-01-31 21:18:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:18:03,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:03,917 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:03,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 21:18:03,917 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:03,917 INFO L85 PathProgramCache]: Analyzing trace with hash -554164583, now seen corresponding path program 51 times [2022-01-31 21:18:03,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:03,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664299905] [2022-01-31 21:18:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:03,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:03,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:03,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:03,919 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:04,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:04,054 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 21:18:04,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664299905] [2022-01-31 21:18:04,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1664299905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:04,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:04,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:18:04,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547161761] [2022-01-31 21:18:04,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:04,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:18:04,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:18:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:18:04,055 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:04,274 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-01-31 21:18:04,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:18:04,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:18:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:04,275 INFO L225 Difference]: With dead ends: 116 [2022-01-31 21:18:04,275 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 21:18:04,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:18:04,275 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:04,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:04,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 21:18:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 85. [2022-01-31 21:18:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-01-31 21:18:04,301 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 32 [2022-01-31 21:18:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:04,302 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-01-31 21:18:04,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:04,302 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-01-31 21:18:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:18:04,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:04,302 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:04,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 21:18:04,302 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:04,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1557480985, now seen corresponding path program 52 times [2022-01-31 21:18:04,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:04,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816982641] [2022-01-31 21:18:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:04,304 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:04,304 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:04,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:04,305 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:04,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:04,406 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:04,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816982641] [2022-01-31 21:18:04,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [816982641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:04,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:04,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:18:04,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394075792] [2022-01-31 21:18:04,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:04,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:18:04,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:18:04,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:18:04,407 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:04,620 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-01-31 21:18:04,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:18:04,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:18:04,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:04,621 INFO L225 Difference]: With dead ends: 122 [2022-01-31 21:18:04,621 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:18:04,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:18:04,621 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:04,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:18:04,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2022-01-31 21:18:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-01-31 21:18:04,646 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 32 [2022-01-31 21:18:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:04,646 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-01-31 21:18:04,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-01-31 21:18:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:18:04,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:04,646 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:04,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 21:18:04,646 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:04,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:04,647 INFO L85 PathProgramCache]: Analyzing trace with hash -670659175, now seen corresponding path program 53 times [2022-01-31 21:18:04,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:04,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353032784] [2022-01-31 21:18:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:04,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:04,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:04,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:04,650 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:04,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:04,750 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 21:18:04,750 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:04,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353032784] [2022-01-31 21:18:04,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1353032784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:04,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:04,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:18:04,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357500954] [2022-01-31 21:18:04,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:04,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:18:04,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:18:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:18:04,751 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:04,970 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-01-31 21:18:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:18:04,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:18:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:04,971 INFO L225 Difference]: With dead ends: 128 [2022-01-31 21:18:04,971 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 21:18:04,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:18:04,972 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:04,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 17 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 21:18:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2022-01-31 21:18:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-01-31 21:18:04,997 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 32 [2022-01-31 21:18:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:04,997 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-01-31 21:18:04,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-01-31 21:18:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:18:04,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:04,998 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:04,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 21:18:04,998 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1275327769, now seen corresponding path program 54 times [2022-01-31 21:18:04,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:04,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784850364] [2022-01-31 21:18:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:05,009 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:05,009 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:05,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:05,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:05,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:05,111 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:05,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784850364] [2022-01-31 21:18:05,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [784850364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:05,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:05,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:18:05,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416152321] [2022-01-31 21:18:05,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:05,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:18:05,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:05,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:18:05,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:18:05,112 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:05,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:05,267 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2022-01-31 21:18:05,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:18:05,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:18:05,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:05,267 INFO L225 Difference]: With dead ends: 114 [2022-01-31 21:18:05,267 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 21:18:05,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:18:05,268 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:05,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:18:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 21:18:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 73. [2022-01-31 21:18:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2022-01-31 21:18:05,308 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 32 [2022-01-31 21:18:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:05,308 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2022-01-31 21:18:05,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2022-01-31 21:18:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:05,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:05,308 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:05,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 21:18:05,309 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2019938492, now seen corresponding path program 55 times [2022-01-31 21:18:05,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:05,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685888165] [2022-01-31 21:18:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:05,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:05,325 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:05,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:05,326 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:05,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:05,424 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685888165] [2022-01-31 21:18:05,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1685888165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:05,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:05,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:05,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589199208] [2022-01-31 21:18:05,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:05,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:05,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:05,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:05,425 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:05,673 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2022-01-31 21:18:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:05,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:05,673 INFO L225 Difference]: With dead ends: 88 [2022-01-31 21:18:05,673 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 21:18:05,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:05,674 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:05,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 21 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 21:18:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-01-31 21:18:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-01-31 21:18:05,697 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 34 [2022-01-31 21:18:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:05,697 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-01-31 21:18:05,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-01-31 21:18:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:05,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:05,698 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:05,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 21:18:05,698 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:05,698 INFO L85 PathProgramCache]: Analyzing trace with hash 924989500, now seen corresponding path program 56 times [2022-01-31 21:18:05,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:05,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670256467] [2022-01-31 21:18:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:05,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:05,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:05,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:05,700 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:05,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:05,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:05,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670256467] [2022-01-31 21:18:05,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670256467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:05,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:05,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:05,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039112889] [2022-01-31 21:18:05,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:05,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:05,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:05,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:05,807 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:06,045 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-01-31 21:18:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:06,046 INFO L225 Difference]: With dead ends: 92 [2022-01-31 21:18:06,046 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 21:18:06,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:06,047 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:06,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 23 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 21:18:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-01-31 21:18:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2022-01-31 21:18:06,077 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 34 [2022-01-31 21:18:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:06,077 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2022-01-31 21:18:06,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2022-01-31 21:18:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:06,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:06,077 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:06,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 21:18:06,078 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:06,078 INFO L85 PathProgramCache]: Analyzing trace with hash 945995708, now seen corresponding path program 57 times [2022-01-31 21:18:06,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:06,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834266384] [2022-01-31 21:18:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:06,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:06,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:06,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:06,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:06,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:06,185 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:06,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834266384] [2022-01-31 21:18:06,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [834266384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:06,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:06,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:06,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541333492] [2022-01-31 21:18:06,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:06,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:06,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:06,187 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:06,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:06,431 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-01-31 21:18:06,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:06,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:06,431 INFO L225 Difference]: With dead ends: 98 [2022-01-31 21:18:06,431 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 21:18:06,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:06,432 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:06,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 23 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 21:18:06,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2022-01-31 21:18:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-01-31 21:18:06,458 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 34 [2022-01-31 21:18:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:06,458 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-01-31 21:18:06,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-01-31 21:18:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:06,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:06,459 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:06,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 21:18:06,459 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash -341874884, now seen corresponding path program 58 times [2022-01-31 21:18:06,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:06,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416631177] [2022-01-31 21:18:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:06,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:06,460 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:06,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:06,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:06,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:06,564 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:06,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416631177] [2022-01-31 21:18:06,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [416631177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:06,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:06,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:06,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939753738] [2022-01-31 21:18:06,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:06,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:06,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:06,565 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:06,790 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-01-31 21:18:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:06,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:06,791 INFO L225 Difference]: With dead ends: 104 [2022-01-31 21:18:06,791 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 21:18:06,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:06,791 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:06,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 21 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 21:18:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2022-01-31 21:18:06,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-01-31 21:18:06,817 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 34 [2022-01-31 21:18:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:06,818 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-01-31 21:18:06,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-01-31 21:18:06,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:06,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:06,818 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:06,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 21:18:06,818 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:06,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1034932548, now seen corresponding path program 59 times [2022-01-31 21:18:06,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:06,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907051448] [2022-01-31 21:18:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:06,820 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:06,820 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:06,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:06,820 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:06,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:06,926 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:06,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907051448] [2022-01-31 21:18:06,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907051448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:06,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:06,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:06,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024981] [2022-01-31 21:18:06,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:06,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:06,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:06,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:06,927 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:07,154 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-01-31 21:18:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:07,157 INFO L225 Difference]: With dead ends: 110 [2022-01-31 21:18:07,157 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:18:07,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:07,179 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:07,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:18:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2022-01-31 21:18:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-01-31 21:18:07,215 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 34 [2022-01-31 21:18:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:07,215 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-01-31 21:18:07,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-01-31 21:18:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:07,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:07,216 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:07,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 21:18:07,216 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:07,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1343416772, now seen corresponding path program 60 times [2022-01-31 21:18:07,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:07,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828919525] [2022-01-31 21:18:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:07,232 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:07,232 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:07,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:07,236 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:07,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:07,353 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 21:18:07,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:07,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828919525] [2022-01-31 21:18:07,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1828919525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:07,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:07,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:07,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193825983] [2022-01-31 21:18:07,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:07,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:07,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:07,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:07,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:07,354 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:07,568 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-01-31 21:18:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:07,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:07,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:07,569 INFO L225 Difference]: With dead ends: 116 [2022-01-31 21:18:07,569 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 21:18:07,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:07,569 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:07,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 21:18:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2022-01-31 21:18:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-01-31 21:18:07,599 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 34 [2022-01-31 21:18:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:07,599 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-01-31 21:18:07,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-01-31 21:18:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:07,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:07,600 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:07,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 21:18:07,600 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:07,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1444012612, now seen corresponding path program 61 times [2022-01-31 21:18:07,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:07,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465150894] [2022-01-31 21:18:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:07,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:07,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:07,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:07,603 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:07,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:07,755 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 21:18:07,756 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:07,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465150894] [2022-01-31 21:18:07,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465150894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:07,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:07,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:07,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641833747] [2022-01-31 21:18:07,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:07,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:07,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:07,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:07,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:07,760 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:08,027 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-01-31 21:18:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:08,029 INFO L225 Difference]: With dead ends: 122 [2022-01-31 21:18:08,029 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:18:08,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:08,029 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:08,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:18:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2022-01-31 21:18:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-01-31 21:18:08,069 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 34 [2022-01-31 21:18:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:08,069 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-01-31 21:18:08,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-01-31 21:18:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:08,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:08,070 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:08,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 21:18:08,070 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:08,070 INFO L85 PathProgramCache]: Analyzing trace with hash 667632956, now seen corresponding path program 62 times [2022-01-31 21:18:08,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:08,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94022011] [2022-01-31 21:18:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:08,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:08,072 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:08,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:08,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:08,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:08,199 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 21:18:08,199 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:08,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94022011] [2022-01-31 21:18:08,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [94022011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:08,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:08,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:08,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537736120] [2022-01-31 21:18:08,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:08,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:08,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:08,200 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:08,451 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-01-31 21:18:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:08,452 INFO L225 Difference]: With dead ends: 128 [2022-01-31 21:18:08,452 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 21:18:08,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:08,454 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:08,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 15 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 21:18:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2022-01-31 21:18:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2022-01-31 21:18:08,485 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 34 [2022-01-31 21:18:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:08,485 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2022-01-31 21:18:08,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2022-01-31 21:18:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:08,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:08,485 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:08,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 21:18:08,485 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1560507204, now seen corresponding path program 63 times [2022-01-31 21:18:08,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:08,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278129177] [2022-01-31 21:18:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:08,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:08,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:08,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:08,487 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:08,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:08,589 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 21:18:08,589 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:08,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278129177] [2022-01-31 21:18:08,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [278129177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:08,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:08,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:08,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174433027] [2022-01-31 21:18:08,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:08,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:08,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:08,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:08,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:08,590 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:08,849 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-01-31 21:18:08,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:08,850 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:08,850 INFO L225 Difference]: With dead ends: 134 [2022-01-31 21:18:08,850 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 21:18:08,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:08,850 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:08,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 21 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 21:18:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2022-01-31 21:18:08,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-01-31 21:18:08,883 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 34 [2022-01-31 21:18:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:08,884 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-01-31 21:18:08,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-01-31 21:18:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:08,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:08,884 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:08,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 21:18:08,884 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:08,885 INFO L85 PathProgramCache]: Analyzing trace with hash 385479740, now seen corresponding path program 64 times [2022-01-31 21:18:08,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:08,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021333327] [2022-01-31 21:18:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:08,886 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:08,886 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:08,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:08,886 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:08,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:08,992 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 21:18:08,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:08,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021333327] [2022-01-31 21:18:08,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2021333327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:08,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:08,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:08,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205025143] [2022-01-31 21:18:08,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:08,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:08,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:08,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:08,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:08,994 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:09,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:09,235 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-01-31 21:18:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:09,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:09,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:09,236 INFO L225 Difference]: With dead ends: 140 [2022-01-31 21:18:09,236 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 21:18:09,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:09,238 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:09,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 21:18:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 97. [2022-01-31 21:18:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-01-31 21:18:09,270 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 34 [2022-01-31 21:18:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:09,270 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-01-31 21:18:09,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-01-31 21:18:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:18:09,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:09,271 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:09,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 21:18:09,271 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:09,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:09,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2126808132, now seen corresponding path program 65 times [2022-01-31 21:18:09,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:09,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127579403] [2022-01-31 21:18:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:09,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:09,272 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:09,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:09,273 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:09,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:09,400 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:09,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127579403] [2022-01-31 21:18:09,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2127579403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:09,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:09,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:18:09,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439950503] [2022-01-31 21:18:09,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:09,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:18:09,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:09,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:18:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:18:09,401 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:09,651 INFO L93 Difference]: Finished difference Result 124 states and 176 transitions. [2022-01-31 21:18:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:18:09,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:18:09,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:09,657 INFO L225 Difference]: With dead ends: 124 [2022-01-31 21:18:09,657 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 21:18:09,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:18:09,657 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:09,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:09,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 21:18:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2022-01-31 21:18:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-01-31 21:18:09,683 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 34 [2022-01-31 21:18:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:09,683 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-01-31 21:18:09,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-01-31 21:18:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:09,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:09,683 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:09,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 21:18:09,683 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:09,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1574474527, now seen corresponding path program 66 times [2022-01-31 21:18:09,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:09,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118423866] [2022-01-31 21:18:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:09,685 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:09,685 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:09,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:09,685 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:09,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:09,798 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:09,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118423866] [2022-01-31 21:18:09,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2118423866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:09,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:09,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:09,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658211478] [2022-01-31 21:18:09,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:09,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:09,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:09,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:09,799 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:10,058 INFO L93 Difference]: Finished difference Result 94 states and 132 transitions. [2022-01-31 21:18:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:10,059 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:10,059 INFO L225 Difference]: With dead ends: 94 [2022-01-31 21:18:10,059 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 21:18:10,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:10,060 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:10,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 21 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 21:18:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-01-31 21:18:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-01-31 21:18:10,088 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 36 [2022-01-31 21:18:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:10,088 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-01-31 21:18:10,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-01-31 21:18:10,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:10,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:10,089 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:10,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 21:18:10,089 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:10,089 INFO L85 PathProgramCache]: Analyzing trace with hash 479525535, now seen corresponding path program 67 times [2022-01-31 21:18:10,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:10,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795863556] [2022-01-31 21:18:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:10,090 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:10,091 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:10,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:10,091 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:10,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:10,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:10,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795863556] [2022-01-31 21:18:10,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1795863556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:10,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:10,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:10,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307595379] [2022-01-31 21:18:10,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:10,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:10,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:10,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:10,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:10,210 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:10,485 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-01-31 21:18:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:10,486 INFO L225 Difference]: With dead ends: 98 [2022-01-31 21:18:10,486 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 21:18:10,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:10,486 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:10,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 21:18:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-01-31 21:18:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-01-31 21:18:10,523 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 36 [2022-01-31 21:18:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:10,523 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-01-31 21:18:10,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-01-31 21:18:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:10,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:10,524 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:10,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 21:18:10,524 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash 500531743, now seen corresponding path program 68 times [2022-01-31 21:18:10,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:10,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291953309] [2022-01-31 21:18:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:10,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:10,525 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:10,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:10,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:10,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:10,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:10,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291953309] [2022-01-31 21:18:10,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [291953309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:10,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:10,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:10,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402856028] [2022-01-31 21:18:10,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:10,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:10,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:10,656 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:10,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:10,922 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-01-31 21:18:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:10,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:10,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:10,923 INFO L225 Difference]: With dead ends: 104 [2022-01-31 21:18:10,923 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 21:18:10,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:10,924 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:10,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 19 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:10,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 21:18:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-01-31 21:18:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-01-31 21:18:10,960 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 36 [2022-01-31 21:18:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:10,960 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-01-31 21:18:10,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-01-31 21:18:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:10,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:10,961 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:10,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 21:18:10,961 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:10,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash -787338849, now seen corresponding path program 69 times [2022-01-31 21:18:10,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:10,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172496339] [2022-01-31 21:18:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:10,963 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:10,963 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:10,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:10,963 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:11,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:11,089 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:11,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172496339] [2022-01-31 21:18:11,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172496339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:11,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:11,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:11,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894613719] [2022-01-31 21:18:11,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:11,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:11,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:11,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:11,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:11,090 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:11,360 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-01-31 21:18:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:11,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:11,361 INFO L225 Difference]: With dead ends: 110 [2022-01-31 21:18:11,361 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:18:11,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:11,362 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:11,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 23 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:18:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2022-01-31 21:18:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-01-31 21:18:11,397 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 36 [2022-01-31 21:18:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:11,398 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-01-31 21:18:11,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-01-31 21:18:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:11,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:11,398 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:11,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 21:18:11,398 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1480396513, now seen corresponding path program 70 times [2022-01-31 21:18:11,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:11,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697696688] [2022-01-31 21:18:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:11,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:11,400 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:11,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:11,400 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:11,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:11,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:11,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697696688] [2022-01-31 21:18:11,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [697696688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:11,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:11,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:11,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309562789] [2022-01-31 21:18:11,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:11,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:11,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:11,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:11,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:11,515 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:11,780 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-01-31 21:18:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:11,780 INFO L225 Difference]: With dead ends: 116 [2022-01-31 21:18:11,780 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 21:18:11,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:11,781 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:11,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:11,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 21:18:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-01-31 21:18:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2022-01-31 21:18:11,814 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 36 [2022-01-31 21:18:11,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:11,814 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2022-01-31 21:18:11,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2022-01-31 21:18:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:11,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:11,814 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:11,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 21:18:11,815 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1788880737, now seen corresponding path program 71 times [2022-01-31 21:18:11,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:11,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733706264] [2022-01-31 21:18:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:11,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:11,816 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:11,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:11,817 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:11,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:11,931 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:11,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733706264] [2022-01-31 21:18:11,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1733706264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:11,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:11,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:11,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929544462] [2022-01-31 21:18:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:11,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:11,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:11,932 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:12,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:12,216 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-01-31 21:18:12,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:12,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:12,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:12,216 INFO L225 Difference]: With dead ends: 122 [2022-01-31 21:18:12,216 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:18:12,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:12,217 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:12,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:18:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2022-01-31 21:18:12,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-01-31 21:18:12,251 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 36 [2022-01-31 21:18:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:12,251 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-01-31 21:18:12,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-01-31 21:18:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:12,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:12,252 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:12,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 21:18:12,252 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:12,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1889476577, now seen corresponding path program 72 times [2022-01-31 21:18:12,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:12,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190665916] [2022-01-31 21:18:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:12,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:12,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:12,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:12,254 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:12,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:12,369 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:12,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190665916] [2022-01-31 21:18:12,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190665916] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:12,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:12,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:12,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929783012] [2022-01-31 21:18:12,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:12,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:12,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:12,370 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:12,645 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-01-31 21:18:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:12,645 INFO L225 Difference]: With dead ends: 128 [2022-01-31 21:18:12,646 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 21:18:12,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:12,646 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:12,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 23 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 21:18:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2022-01-31 21:18:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-01-31 21:18:12,681 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 36 [2022-01-31 21:18:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:12,681 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-01-31 21:18:12,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-01-31 21:18:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:12,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:12,681 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:12,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 21:18:12,681 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:12,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:12,682 INFO L85 PathProgramCache]: Analyzing trace with hash 222168991, now seen corresponding path program 73 times [2022-01-31 21:18:12,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:12,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583116886] [2022-01-31 21:18:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:12,683 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:12,683 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:12,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:12,684 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:12,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:12,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583116886] [2022-01-31 21:18:12,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583116886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:12,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:12,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:12,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480901719] [2022-01-31 21:18:12,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:12,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:12,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:12,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:12,798 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:13,082 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-01-31 21:18:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:13,083 INFO L225 Difference]: With dead ends: 134 [2022-01-31 21:18:13,083 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 21:18:13,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:13,083 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:13,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 21:18:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2022-01-31 21:18:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-01-31 21:18:13,119 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 36 [2022-01-31 21:18:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:13,119 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-01-31 21:18:13,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-01-31 21:18:13,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:13,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:13,120 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:13,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 21:18:13,120 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2005971169, now seen corresponding path program 74 times [2022-01-31 21:18:13,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:13,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162703125] [2022-01-31 21:18:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:13,121 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:13,121 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:13,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:13,122 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:13,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:13,236 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162703125] [2022-01-31 21:18:13,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [162703125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:13,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:13,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:13,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117980165] [2022-01-31 21:18:13,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:13,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:13,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:13,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:13,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:13,237 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:13,481 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-01-31 21:18:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:13,482 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:13,482 INFO L225 Difference]: With dead ends: 140 [2022-01-31 21:18:13,482 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 21:18:13,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:13,483 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:13,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 21:18:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2022-01-31 21:18:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-01-31 21:18:13,521 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 36 [2022-01-31 21:18:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:13,521 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-01-31 21:18:13,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-01-31 21:18:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:13,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:13,521 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:13,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 21:18:13,522 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash -59984225, now seen corresponding path program 75 times [2022-01-31 21:18:13,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:13,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494829949] [2022-01-31 21:18:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:13,523 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:13,523 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:13,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:13,524 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:13,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:13,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:13,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494829949] [2022-01-31 21:18:13,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [494829949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:13,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:13,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:13,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434399063] [2022-01-31 21:18:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:13,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:13,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:13,631 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:13,854 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-01-31 21:18:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:13,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:13,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:13,855 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:18:13,855 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:18:13,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:13,856 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:13,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 25 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:18:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:18:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2022-01-31 21:18:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-01-31 21:18:13,893 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 36 [2022-01-31 21:18:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:13,893 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-01-31 21:18:13,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-01-31 21:18:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:13,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:13,894 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:13,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 21:18:13,894 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:13,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1722695199, now seen corresponding path program 76 times [2022-01-31 21:18:13,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:13,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617276075] [2022-01-31 21:18:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:13,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:13,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:13,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:13,896 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:13,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:13,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:13,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617276075] [2022-01-31 21:18:13,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [617276075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:13,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:13,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:13,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387716596] [2022-01-31 21:18:13,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:13,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:13,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:13,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:13,975 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:14,220 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-01-31 21:18:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:14,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:14,221 INFO L225 Difference]: With dead ends: 152 [2022-01-31 21:18:14,221 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:18:14,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:14,221 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:14,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:18:14,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:18:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2022-01-31 21:18:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-01-31 21:18:14,259 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 36 [2022-01-31 21:18:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:14,260 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-01-31 21:18:14,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-01-31 21:18:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:18:14,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:14,260 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:14,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 21:18:14,260 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1185670559, now seen corresponding path program 77 times [2022-01-31 21:18:14,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:14,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141702533] [2022-01-31 21:18:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:14,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:14,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:14,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:14,262 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:14,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:14,374 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141702533] [2022-01-31 21:18:14,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1141702533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:14,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:14,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:18:14,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410165974] [2022-01-31 21:18:14,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:14,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:18:14,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:14,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:18:14,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:18:14,375 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:14,646 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-01-31 21:18:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:18:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:18:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:14,647 INFO L225 Difference]: With dead ends: 134 [2022-01-31 21:18:14,647 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 21:18:14,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:18:14,648 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:14,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 19 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 21:18:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 85. [2022-01-31 21:18:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-01-31 21:18:14,678 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 36 [2022-01-31 21:18:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:14,678 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-01-31 21:18:14,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-01-31 21:18:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:14,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:14,678 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:14,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 21:18:14,678 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1314633534, now seen corresponding path program 78 times [2022-01-31 21:18:14,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:14,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399575360] [2022-01-31 21:18:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:14,680 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:14,680 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:14,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:14,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:14,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:14,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:14,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399575360] [2022-01-31 21:18:14,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399575360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:14,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:14,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:14,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662275935] [2022-01-31 21:18:14,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:14,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:14,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:14,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:14,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:14,807 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:15,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:15,077 INFO L93 Difference]: Finished difference Result 100 states and 141 transitions. [2022-01-31 21:18:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:15,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:15,084 INFO L225 Difference]: With dead ends: 100 [2022-01-31 21:18:15,084 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 21:18:15,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:15,084 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:15,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 23 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:15,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 21:18:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-01-31 21:18:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-01-31 21:18:15,116 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 38 [2022-01-31 21:18:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:15,116 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-01-31 21:18:15,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-01-31 21:18:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:15,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:15,116 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:15,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 21:18:15,117 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1885384770, now seen corresponding path program 79 times [2022-01-31 21:18:15,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:15,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569740099] [2022-01-31 21:18:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:15,118 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:15,118 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:15,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:15,119 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:15,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:15,260 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569740099] [2022-01-31 21:18:15,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [569740099] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:15,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:15,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:15,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800758892] [2022-01-31 21:18:15,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:15,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:15,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:15,261 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:15,537 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-01-31 21:18:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:15,537 INFO L225 Difference]: With dead ends: 104 [2022-01-31 21:18:15,537 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 21:18:15,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:15,538 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:15,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 21 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 21:18:15,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-01-31 21:18:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2022-01-31 21:18:15,572 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 38 [2022-01-31 21:18:15,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:15,573 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2022-01-31 21:18:15,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:15,573 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2022-01-31 21:18:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:15,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:15,573 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:15,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 21:18:15,573 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1906390978, now seen corresponding path program 80 times [2022-01-31 21:18:15,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:15,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919620187] [2022-01-31 21:18:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:15,575 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:15,575 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:15,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:15,575 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:15,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:15,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:15,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919620187] [2022-01-31 21:18:15,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [919620187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:15,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:15,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:15,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027367130] [2022-01-31 21:18:15,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:15,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:15,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:15,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:15,706 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:15,971 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-01-31 21:18:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:15,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:15,971 INFO L225 Difference]: With dead ends: 110 [2022-01-31 21:18:15,971 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:18:15,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:15,972 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:15,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:18:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2022-01-31 21:18:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-01-31 21:18:16,008 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 38 [2022-01-31 21:18:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:16,008 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-01-31 21:18:16,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-01-31 21:18:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:16,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:16,009 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:16,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 21:18:16,009 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash 618520386, now seen corresponding path program 81 times [2022-01-31 21:18:16,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:16,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686307866] [2022-01-31 21:18:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:16,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:16,010 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:16,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:16,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:16,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:16,139 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:16,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686307866] [2022-01-31 21:18:16,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [686307866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:16,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:16,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:16,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842967619] [2022-01-31 21:18:16,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:16,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:16,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:16,140 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:16,433 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-01-31 21:18:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:16,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:16,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:16,433 INFO L225 Difference]: With dead ends: 116 [2022-01-31 21:18:16,433 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 21:18:16,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:16,434 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:16,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 23 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 21:18:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2022-01-31 21:18:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-01-31 21:18:16,470 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 38 [2022-01-31 21:18:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:16,470 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-01-31 21:18:16,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-01-31 21:18:16,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:16,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:16,471 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:16,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 21:18:16,472 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash -74537278, now seen corresponding path program 82 times [2022-01-31 21:18:16,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:16,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456362159] [2022-01-31 21:18:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:16,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:16,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:16,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:16,475 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:16,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:16,606 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:16,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456362159] [2022-01-31 21:18:16,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [456362159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:16,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:16,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:16,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859707804] [2022-01-31 21:18:16,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:16,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:16,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:16,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:16,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:16,607 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:16,929 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-01-31 21:18:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:16,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:16,930 INFO L225 Difference]: With dead ends: 122 [2022-01-31 21:18:16,930 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:18:16,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:16,931 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:16,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 19 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:18:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2022-01-31 21:18:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-01-31 21:18:16,972 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 38 [2022-01-31 21:18:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:16,972 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-01-31 21:18:16,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-01-31 21:18:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:16,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:16,973 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:16,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 21:18:16,973 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:16,974 INFO L85 PathProgramCache]: Analyzing trace with hash -383021502, now seen corresponding path program 83 times [2022-01-31 21:18:16,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:16,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650870865] [2022-01-31 21:18:16,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:16,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:16,975 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:16,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:16,975 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:17,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:17,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:17,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650870865] [2022-01-31 21:18:17,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650870865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:17,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:17,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:17,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131338685] [2022-01-31 21:18:17,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:17,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:17,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:17,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:17,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:17,102 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:17,398 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-01-31 21:18:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:17,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:17,399 INFO L225 Difference]: With dead ends: 128 [2022-01-31 21:18:17,399 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 21:18:17,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:17,399 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:17,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 19 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 21:18:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2022-01-31 21:18:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-01-31 21:18:17,448 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 38 [2022-01-31 21:18:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:17,449 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-01-31 21:18:17,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-01-31 21:18:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:17,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:17,449 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:17,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 21:18:17,449 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash -483617342, now seen corresponding path program 84 times [2022-01-31 21:18:17,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:17,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379533807] [2022-01-31 21:18:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:17,451 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:17,451 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:17,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:17,451 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:17,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:17,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:17,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379533807] [2022-01-31 21:18:17,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [379533807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:17,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:17,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:17,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2477134] [2022-01-31 21:18:17,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:17,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:17,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:17,579 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:17,874 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-01-31 21:18:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:17,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:17,875 INFO L225 Difference]: With dead ends: 134 [2022-01-31 21:18:17,875 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 21:18:17,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:17,876 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:17,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 21:18:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 103. [2022-01-31 21:18:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-01-31 21:18:17,917 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 38 [2022-01-31 21:18:17,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:17,917 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-01-31 21:18:17,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:17,917 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-01-31 21:18:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:17,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:17,917 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:17,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 21:18:17,918 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1628028226, now seen corresponding path program 85 times [2022-01-31 21:18:17,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:17,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539096153] [2022-01-31 21:18:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:17,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:17,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:17,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:17,919 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:18,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:18,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539096153] [2022-01-31 21:18:18,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [539096153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:18,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:18,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:18,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903890283] [2022-01-31 21:18:18,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:18,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:18,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:18,045 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:18,347 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-01-31 21:18:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:18,348 INFO L225 Difference]: With dead ends: 140 [2022-01-31 21:18:18,348 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 21:18:18,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:18,348 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:18,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 21:18:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 105. [2022-01-31 21:18:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-01-31 21:18:18,391 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 38 [2022-01-31 21:18:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:18,391 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-01-31 21:18:18,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-01-31 21:18:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:18,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:18,391 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:18,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 21:18:18,391 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash -600111934, now seen corresponding path program 86 times [2022-01-31 21:18:18,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:18,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644571833] [2022-01-31 21:18:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:18,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:18,393 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:18,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:18,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:18,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:18,522 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:18,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644571833] [2022-01-31 21:18:18,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [644571833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:18,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:18,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:18,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449533603] [2022-01-31 21:18:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:18,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:18,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:18,523 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:18,752 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-01-31 21:18:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:18,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:18,753 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:18:18,753 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:18:18,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:18,754 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:18,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:18,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:18:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2022-01-31 21:18:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-01-31 21:18:18,804 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 38 [2022-01-31 21:18:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:18,804 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-01-31 21:18:18,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-01-31 21:18:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:18,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:18,805 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:18,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 21:18:18,805 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:18,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:18,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1345875010, now seen corresponding path program 87 times [2022-01-31 21:18:18,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:18,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985992835] [2022-01-31 21:18:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:18,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:18,806 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:18,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:18,807 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:18,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:18,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:18,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985992835] [2022-01-31 21:18:18,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [985992835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:18,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:18,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:18,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558860688] [2022-01-31 21:18:18,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:18,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:18,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:18,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:18,896 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:19,110 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-01-31 21:18:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:19,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:19,110 INFO L225 Difference]: With dead ends: 152 [2022-01-31 21:18:19,110 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:18:19,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:19,111 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:19,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:18:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:18:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 109. [2022-01-31 21:18:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-01-31 21:18:19,155 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 38 [2022-01-31 21:18:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:19,155 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-01-31 21:18:19,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-01-31 21:18:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:19,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:19,155 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:19,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 21:18:19,155 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1166412862, now seen corresponding path program 88 times [2022-01-31 21:18:19,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:19,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660433555] [2022-01-31 21:18:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:19,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:19,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:19,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:19,157 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:19,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:19,243 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 21:18:19,243 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660433555] [2022-01-31 21:18:19,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [660433555] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:19,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:19,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:19,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760384521] [2022-01-31 21:18:19,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:19,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:19,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:19,244 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:19,538 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-01-31 21:18:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:19,539 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:18:19,539 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:18:19,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:19,539 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:19,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 27 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:18:19,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2022-01-31 21:18:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-01-31 21:18:19,584 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 38 [2022-01-31 21:18:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:19,584 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-01-31 21:18:19,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-01-31 21:18:19,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:19,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:19,585 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:19,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 21:18:19,585 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:19,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1703437502, now seen corresponding path program 89 times [2022-01-31 21:18:19,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:19,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846201794] [2022-01-31 21:18:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:19,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:19,586 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:19,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:19,587 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:19,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:19,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:19,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846201794] [2022-01-31 21:18:19,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1846201794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:19,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:19,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:19,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449163356] [2022-01-31 21:18:19,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:19,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:19,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:19,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:19,706 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:20,026 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:18:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:20,027 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:18:20,027 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:18:20,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:20,027 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:20,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:18:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2022-01-31 21:18:20,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-01-31 21:18:20,074 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 38 [2022-01-31 21:18:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:20,074 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-01-31 21:18:20,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-01-31 21:18:20,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:18:20,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:20,075 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:20,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 21:18:20,075 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:20,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1906926274, now seen corresponding path program 90 times [2022-01-31 21:18:20,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:20,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522858857] [2022-01-31 21:18:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:20,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:20,077 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:20,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:20,077 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:20,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:20,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:20,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522858857] [2022-01-31 21:18:20,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522858857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:20,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:20,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:18:20,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110624996] [2022-01-31 21:18:20,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:20,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:18:20,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:18:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:18:20,202 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:20,495 INFO L93 Difference]: Finished difference Result 144 states and 206 transitions. [2022-01-31 21:18:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:18:20,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:18:20,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:20,496 INFO L225 Difference]: With dead ends: 144 [2022-01-31 21:18:20,496 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 21:18:20,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:18:20,496 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:20,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 21:18:20,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2022-01-31 21:18:20,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-01-31 21:18:20,538 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 38 [2022-01-31 21:18:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:20,539 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-01-31 21:18:20,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-01-31 21:18:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:20,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:20,539 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:20,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 21:18:20,539 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:20,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:20,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1096360357, now seen corresponding path program 91 times [2022-01-31 21:18:20,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:20,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892764950] [2022-01-31 21:18:20,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:20,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:20,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:20,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:20,541 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:20,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:20,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:20,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892764950] [2022-01-31 21:18:20,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892764950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:20,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:20,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:20,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43566931] [2022-01-31 21:18:20,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:20,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:20,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:20,678 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:20,967 INFO L93 Difference]: Finished difference Result 106 states and 150 transitions. [2022-01-31 21:18:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:20,969 INFO L225 Difference]: With dead ends: 106 [2022-01-31 21:18:20,969 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 21:18:20,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:20,970 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:20,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 21 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 21:18:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-01-31 21:18:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-01-31 21:18:21,021 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 40 [2022-01-31 21:18:21,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:21,021 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-01-31 21:18:21,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:21,021 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-01-31 21:18:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:21,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:21,022 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:21,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 21:18:21,022 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:21,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1411365, now seen corresponding path program 92 times [2022-01-31 21:18:21,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:21,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900376975] [2022-01-31 21:18:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:21,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:21,024 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:21,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:21,024 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:21,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:21,174 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:21,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900376975] [2022-01-31 21:18:21,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [900376975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:21,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:21,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:21,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780021134] [2022-01-31 21:18:21,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:21,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:21,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:21,175 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:21,492 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-01-31 21:18:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:21,493 INFO L225 Difference]: With dead ends: 110 [2022-01-31 21:18:21,493 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:18:21,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:21,494 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:21,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:18:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-01-31 21:18:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-01-31 21:18:21,540 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 40 [2022-01-31 21:18:21,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:21,540 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-01-31 21:18:21,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-01-31 21:18:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:21,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:21,541 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:21,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 21:18:21,541 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:21,541 INFO L85 PathProgramCache]: Analyzing trace with hash 22417573, now seen corresponding path program 93 times [2022-01-31 21:18:21,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:21,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436442988] [2022-01-31 21:18:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:21,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:21,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:21,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:21,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:21,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:21,684 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:21,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436442988] [2022-01-31 21:18:21,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436442988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:21,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:21,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:21,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164913661] [2022-01-31 21:18:21,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:21,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:21,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:21,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:21,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:21,685 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:21,998 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-01-31 21:18:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:21,998 INFO L225 Difference]: With dead ends: 116 [2022-01-31 21:18:21,998 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 21:18:21,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:21,999 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:21,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:21,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 21:18:22,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2022-01-31 21:18:22,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-01-31 21:18:22,045 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 40 [2022-01-31 21:18:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:22,045 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-01-31 21:18:22,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-01-31 21:18:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:22,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:22,045 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:22,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 21:18:22,045 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1265453019, now seen corresponding path program 94 times [2022-01-31 21:18:22,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:22,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394417008] [2022-01-31 21:18:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:22,047 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:22,047 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:22,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:22,047 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:22,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:22,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394417008] [2022-01-31 21:18:22,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [394417008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:22,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:22,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:22,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033321004] [2022-01-31 21:18:22,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:22,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:22,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:22,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:22,190 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:22,522 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-01-31 21:18:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:22,523 INFO L225 Difference]: With dead ends: 122 [2022-01-31 21:18:22,523 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:18:22,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:22,523 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:22,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:18:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2022-01-31 21:18:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-01-31 21:18:22,584 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 40 [2022-01-31 21:18:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:22,585 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-01-31 21:18:22,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-01-31 21:18:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:22,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:22,585 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:22,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 21:18:22,585 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:22,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:22,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1958510683, now seen corresponding path program 95 times [2022-01-31 21:18:22,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:22,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122386744] [2022-01-31 21:18:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:22,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:22,587 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:22,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:22,587 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:22,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:22,724 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122386744] [2022-01-31 21:18:22,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122386744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:22,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:22,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:22,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724894386] [2022-01-31 21:18:22,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:22,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:22,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:22,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:22,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:22,725 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:23,057 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-01-31 21:18:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:23,058 INFO L225 Difference]: With dead ends: 128 [2022-01-31 21:18:23,058 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 21:18:23,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:23,058 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:23,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 21:18:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2022-01-31 21:18:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-01-31 21:18:23,105 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 40 [2022-01-31 21:18:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:23,105 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-01-31 21:18:23,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-01-31 21:18:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:23,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:23,106 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:23,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 21:18:23,106 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:23,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2027972389, now seen corresponding path program 96 times [2022-01-31 21:18:23,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:23,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722168326] [2022-01-31 21:18:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:23,108 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:23,108 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:23,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:23,108 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:23,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:23,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:23,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722168326] [2022-01-31 21:18:23,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [722168326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:23,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:23,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:23,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623194620] [2022-01-31 21:18:23,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:23,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:23,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:23,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:23,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:23,245 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:23,567 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-01-31 21:18:23,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:23,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:23,568 INFO L225 Difference]: With dead ends: 134 [2022-01-31 21:18:23,568 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 21:18:23,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:23,569 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:23,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:23,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 21:18:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 107. [2022-01-31 21:18:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-01-31 21:18:23,623 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 40 [2022-01-31 21:18:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:23,623 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-01-31 21:18:23,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-01-31 21:18:23,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:23,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:23,623 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:23,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 21:18:23,623 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:23,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1927376549, now seen corresponding path program 97 times [2022-01-31 21:18:23,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:23,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001107919] [2022-01-31 21:18:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:23,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:23,625 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:23,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:23,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:23,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:23,760 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:23,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001107919] [2022-01-31 21:18:23,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2001107919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:23,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:23,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:23,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730292637] [2022-01-31 21:18:23,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:23,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:23,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:23,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:23,761 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:24,013 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-01-31 21:18:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:24,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:24,014 INFO L225 Difference]: With dead ends: 140 [2022-01-31 21:18:24,014 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 21:18:24,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:24,015 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:24,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 21:18:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 109. [2022-01-31 21:18:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-01-31 21:18:24,063 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 40 [2022-01-31 21:18:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:24,063 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-01-31 21:18:24,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-01-31 21:18:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:24,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:24,064 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:24,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 21:18:24,064 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash -255945179, now seen corresponding path program 98 times [2022-01-31 21:18:24,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:24,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069008251] [2022-01-31 21:18:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:24,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:24,065 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:24,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:24,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:24,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:24,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:24,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069008251] [2022-01-31 21:18:24,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2069008251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:24,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:24,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:24,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546501391] [2022-01-31 21:18:24,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:24,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:24,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:24,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:24,172 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:24,517 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-01-31 21:18:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:24,517 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:24,518 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:18:24,518 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:18:24,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:24,518 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:24,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:18:24,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 111. [2022-01-31 21:18:24,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-01-31 21:18:24,569 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 40 [2022-01-31 21:18:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:24,569 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-01-31 21:18:24,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-01-31 21:18:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:24,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:24,570 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:24,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 21:18:24,570 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:24,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:24,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1810881957, now seen corresponding path program 99 times [2022-01-31 21:18:24,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:24,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348510533] [2022-01-31 21:18:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:24,571 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:24,571 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:24,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:24,572 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:24,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:24,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:24,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348510533] [2022-01-31 21:18:24,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1348510533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:24,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:24,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:24,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340919415] [2022-01-31 21:18:24,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:24,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:24,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:24,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:24,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:24,710 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:25,013 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-01-31 21:18:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:25,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:25,014 INFO L225 Difference]: With dead ends: 152 [2022-01-31 21:18:25,014 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:18:25,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:25,014 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:25,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:25,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:18:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2022-01-31 21:18:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-01-31 21:18:25,068 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 40 [2022-01-31 21:18:25,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:25,068 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-01-31 21:18:25,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-01-31 21:18:25,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:25,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:25,069 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:25,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 21:18:25,069 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:25,069 INFO L85 PathProgramCache]: Analyzing trace with hash -538098395, now seen corresponding path program 100 times [2022-01-31 21:18:25,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:25,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598794428] [2022-01-31 21:18:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:25,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:25,071 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:25,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:25,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:25,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:25,207 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 21:18:25,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598794428] [2022-01-31 21:18:25,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [598794428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:25,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:25,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:25,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366501857] [2022-01-31 21:18:25,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:25,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:25,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:25,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:25,208 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:25,543 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-01-31 21:18:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:25,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:25,544 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:18:25,544 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:18:25,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:25,546 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:25,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:18:25,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2022-01-31 21:18:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-01-31 21:18:25,617 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 40 [2022-01-31 21:18:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:25,618 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-01-31 21:18:25,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-01-31 21:18:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:25,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:25,618 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:25,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 21:18:25,618 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1244581029, now seen corresponding path program 101 times [2022-01-31 21:18:25,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:25,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564998858] [2022-01-31 21:18:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:25,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:25,620 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:25,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:25,621 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:25,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:25,757 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 21:18:25,757 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564998858] [2022-01-31 21:18:25,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [564998858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:25,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:25,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:25,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723054807] [2022-01-31 21:18:25,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:25,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:25,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:25,758 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:26,091 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:18:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:26,092 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:18:26,092 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:18:26,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:26,103 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:26,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:26,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:18:26,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2022-01-31 21:18:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-01-31 21:18:26,167 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 40 [2022-01-31 21:18:26,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:26,167 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-01-31 21:18:26,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:26,168 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-01-31 21:18:26,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:26,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:26,168 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:26,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 21:18:26,168 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 707556389, now seen corresponding path program 102 times [2022-01-31 21:18:26,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:26,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515734237] [2022-01-31 21:18:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:26,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:26,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:26,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:26,170 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:26,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:26,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515734237] [2022-01-31 21:18:26,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [515734237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:26,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:26,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:26,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061272046] [2022-01-31 21:18:26,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:26,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:26,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:26,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:26,302 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:26,643 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:18:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:26,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:26,644 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:18:26,644 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:18:26,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:26,644 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:26,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 15 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:18:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 119. [2022-01-31 21:18:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-01-31 21:18:26,698 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 40 [2022-01-31 21:18:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:26,698 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-01-31 21:18:26,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-01-31 21:18:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:26,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:26,699 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:26,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 21:18:26,699 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash 22952869, now seen corresponding path program 103 times [2022-01-31 21:18:26,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:26,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895832231] [2022-01-31 21:18:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:26,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:26,700 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:26,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:26,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:26,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:26,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895832231] [2022-01-31 21:18:26,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895832231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:26,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:26,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:26,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690643996] [2022-01-31 21:18:26,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:26,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:26,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:26,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:26,849 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:27,196 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:18:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:27,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:27,197 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:18:27,197 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:18:27,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:27,197 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:27,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 25 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:27,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:18:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 121. [2022-01-31 21:18:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-01-31 21:18:27,252 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 40 [2022-01-31 21:18:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:27,252 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-01-31 21:18:27,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-01-31 21:18:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:18:27,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:27,253 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:27,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 21:18:27,253 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash -751033563, now seen corresponding path program 104 times [2022-01-31 21:18:27,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:27,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698578870] [2022-01-31 21:18:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:27,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:27,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:27,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:27,255 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:27,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:27,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:27,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698578870] [2022-01-31 21:18:27,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1698578870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:27,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:27,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:18:27,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697298073] [2022-01-31 21:18:27,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:27,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:18:27,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:27,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:18:27,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:18:27,394 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:27,661 INFO L93 Difference]: Finished difference Result 154 states and 221 transitions. [2022-01-31 21:18:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:18:27,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:18:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:27,661 INFO L225 Difference]: With dead ends: 154 [2022-01-31 21:18:27,661 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 21:18:27,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:18:27,662 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:27,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 21:18:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 97. [2022-01-31 21:18:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-01-31 21:18:27,713 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 40 [2022-01-31 21:18:27,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:27,713 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-01-31 21:18:27,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-01-31 21:18:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:27,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:27,714 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:27,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 21:18:27,714 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:27,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:27,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1220850232, now seen corresponding path program 105 times [2022-01-31 21:18:27,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:27,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505767541] [2022-01-31 21:18:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:27,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:27,715 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:27,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:27,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:27,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:27,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:27,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505767541] [2022-01-31 21:18:27,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [505767541] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:27,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:27,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:27,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752676962] [2022-01-31 21:18:27,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:27,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:27,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:27,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:27,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:27,860 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:28,219 INFO L93 Difference]: Finished difference Result 112 states and 159 transitions. [2022-01-31 21:18:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:28,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:28,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:28,220 INFO L225 Difference]: With dead ends: 112 [2022-01-31 21:18:28,220 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 21:18:28,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:28,220 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:28,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:28,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 21:18:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-01-31 21:18:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-01-31 21:18:28,264 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 42 [2022-01-31 21:18:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:28,264 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-01-31 21:18:28,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-01-31 21:18:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:28,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:28,264 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:28,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 21:18:28,264 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1979168072, now seen corresponding path program 106 times [2022-01-31 21:18:28,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:28,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501011360] [2022-01-31 21:18:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:28,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:28,266 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:28,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:28,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:28,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:28,408 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 21:18:28,409 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:28,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501011360] [2022-01-31 21:18:28,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1501011360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:28,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:28,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:28,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462534880] [2022-01-31 21:18:28,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:28,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:28,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:28,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:28,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:28,409 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:28,717 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-01-31 21:18:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:28,717 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:28,717 INFO L225 Difference]: With dead ends: 116 [2022-01-31 21:18:28,717 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 21:18:28,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:28,718 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:28,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 17 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 21:18:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2022-01-31 21:18:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-01-31 21:18:28,765 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 42 [2022-01-31 21:18:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:28,765 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-01-31 21:18:28,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-01-31 21:18:28,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:28,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:28,766 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:28,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 21:18:28,766 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2000174280, now seen corresponding path program 107 times [2022-01-31 21:18:28,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:28,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823909617] [2022-01-31 21:18:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:28,767 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:28,767 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:28,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:28,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:28,928 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:28,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823909617] [2022-01-31 21:18:28,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [823909617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:28,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:28,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:28,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168889266] [2022-01-31 21:18:28,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:28,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:28,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:28,929 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:29,181 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-01-31 21:18:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:29,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:29,181 INFO L225 Difference]: With dead ends: 122 [2022-01-31 21:18:29,181 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:18:29,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:29,182 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:29,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:18:29,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2022-01-31 21:18:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-01-31 21:18:29,231 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 42 [2022-01-31 21:18:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:29,232 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-01-31 21:18:29,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-01-31 21:18:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:29,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:29,232 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:29,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 21:18:29,232 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:29,232 INFO L85 PathProgramCache]: Analyzing trace with hash 712303688, now seen corresponding path program 108 times [2022-01-31 21:18:29,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:29,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318233080] [2022-01-31 21:18:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:29,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:29,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:29,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:29,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:29,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:29,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:29,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318233080] [2022-01-31 21:18:29,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [318233080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:29,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:29,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:29,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305194749] [2022-01-31 21:18:29,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:29,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:29,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:29,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:29,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:29,405 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:29,777 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-01-31 21:18:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:29,777 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:29,778 INFO L225 Difference]: With dead ends: 128 [2022-01-31 21:18:29,778 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 21:18:29,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:29,778 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:29,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 21:18:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2022-01-31 21:18:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-01-31 21:18:29,838 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 42 [2022-01-31 21:18:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:29,838 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-01-31 21:18:29,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-01-31 21:18:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:29,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:29,838 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:29,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 21:18:29,839 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:29,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash 19246024, now seen corresponding path program 109 times [2022-01-31 21:18:29,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:29,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897851106] [2022-01-31 21:18:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:29,840 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:29,840 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:29,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:29,840 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:30,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:30,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:30,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897851106] [2022-01-31 21:18:30,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [897851106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:30,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:30,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:30,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867652760] [2022-01-31 21:18:30,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:30,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:30,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:30,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:30,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:30,016 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:30,364 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-01-31 21:18:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:30,364 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:30,364 INFO L225 Difference]: With dead ends: 134 [2022-01-31 21:18:30,364 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 21:18:30,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:30,365 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:30,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 21:18:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2022-01-31 21:18:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-01-31 21:18:30,424 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 42 [2022-01-31 21:18:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:30,424 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-01-31 21:18:30,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-01-31 21:18:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:30,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:30,425 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:30,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 21:18:30,425 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -289238200, now seen corresponding path program 110 times [2022-01-31 21:18:30,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:30,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336199463] [2022-01-31 21:18:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:30,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:30,426 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:30,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:30,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:30,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:30,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:30,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336199463] [2022-01-31 21:18:30,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336199463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:30,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:30,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:30,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954301176] [2022-01-31 21:18:30,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:30,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:30,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:30,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:30,556 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:30,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:30,911 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-01-31 21:18:30,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:30,911 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:30,912 INFO L225 Difference]: With dead ends: 140 [2022-01-31 21:18:30,912 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 21:18:30,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:30,912 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:30,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 21:18:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 113. [2022-01-31 21:18:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-01-31 21:18:30,969 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 42 [2022-01-31 21:18:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:30,969 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-01-31 21:18:30,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-01-31 21:18:30,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:30,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:30,969 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:30,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 21:18:30,969 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:30,969 INFO L85 PathProgramCache]: Analyzing trace with hash -389834040, now seen corresponding path program 111 times [2022-01-31 21:18:30,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:30,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000512958] [2022-01-31 21:18:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:30,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:30,971 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:30,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:30,971 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:31,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:31,121 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 21:18:31,121 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000512958] [2022-01-31 21:18:31,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000512958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:31,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:31,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:31,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220904168] [2022-01-31 21:18:31,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:31,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:31,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:31,122 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:31,500 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-01-31 21:18:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:31,501 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:18:31,501 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:18:31,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:31,501 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:31,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 27 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:18:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 115. [2022-01-31 21:18:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-01-31 21:18:31,557 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 42 [2022-01-31 21:18:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:31,557 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-01-31 21:18:31,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-01-31 21:18:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:31,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:31,558 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:31,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 21:18:31,558 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:31,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:31,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1721811528, now seen corresponding path program 112 times [2022-01-31 21:18:31,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:31,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900916286] [2022-01-31 21:18:31,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:31,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:31,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:31,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:31,560 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:31,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:31,712 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900916286] [2022-01-31 21:18:31,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [900916286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:31,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:31,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:31,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328763682] [2022-01-31 21:18:31,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:31,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:31,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:31,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:31,713 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:32,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:32,057 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-01-31 21:18:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:32,057 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:32,057 INFO L225 Difference]: With dead ends: 152 [2022-01-31 21:18:32,057 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:18:32,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:32,058 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:32,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:18:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 117. [2022-01-31 21:18:32,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-01-31 21:18:32,118 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 42 [2022-01-31 21:18:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:32,118 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-01-31 21:18:32,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-01-31 21:18:32,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:32,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:32,119 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:32,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 21:18:32,119 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash -506328632, now seen corresponding path program 113 times [2022-01-31 21:18:32,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:32,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508225217] [2022-01-31 21:18:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:32,120 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:32,120 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:32,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:32,121 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:32,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:32,287 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 21:18:32,287 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:32,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508225217] [2022-01-31 21:18:32,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [508225217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:32,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:32,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:32,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715692881] [2022-01-31 21:18:32,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:32,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:32,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:32,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:32,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:32,288 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:32,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:32,647 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-01-31 21:18:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:32,648 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:32,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:32,648 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:18:32,648 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:18:32,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:32,649 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:32,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:18:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2022-01-31 21:18:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-01-31 21:18:32,719 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 42 [2022-01-31 21:18:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:32,719 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-01-31 21:18:32,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:32,719 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-01-31 21:18:32,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:32,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:32,720 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:32,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 21:18:32,720 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:32,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1439658312, now seen corresponding path program 114 times [2022-01-31 21:18:32,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:32,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540254040] [2022-01-31 21:18:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:32,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:32,722 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:32,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:32,722 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:32,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:32,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:32,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540254040] [2022-01-31 21:18:32,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [540254040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:32,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:32,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:32,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088300913] [2022-01-31 21:18:32,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:32,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:32,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:32,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:32,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:32,880 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:33,257 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:18:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:33,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:33,258 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:18:33,258 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:18:33,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:33,259 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:33,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:18:33,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 121. [2022-01-31 21:18:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-01-31 21:18:33,328 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 42 [2022-01-31 21:18:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:33,328 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-01-31 21:18:33,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-01-31 21:18:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:33,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:33,329 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:33,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 21:18:33,329 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1072629560, now seen corresponding path program 115 times [2022-01-31 21:18:33,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:33,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513804261] [2022-01-31 21:18:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:33,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:33,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:33,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:33,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:33,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:33,486 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:33,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513804261] [2022-01-31 21:18:33,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1513804261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:33,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:33,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:33,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323858925] [2022-01-31 21:18:33,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:33,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:33,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:33,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:33,488 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:33,865 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:18:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:33,865 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:33,866 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:18:33,866 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:18:33,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:33,868 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:33,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 17 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:18:33,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2022-01-31 21:18:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-01-31 21:18:33,941 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 42 [2022-01-31 21:18:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:33,941 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-01-31 21:18:33,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-01-31 21:18:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:33,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:33,942 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:33,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 21:18:33,942 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:33,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:33,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1609654200, now seen corresponding path program 116 times [2022-01-31 21:18:33,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:33,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344801552] [2022-01-31 21:18:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:33,943 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:33,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:33,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:33,944 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:34,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:34,093 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 21:18:34,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:34,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344801552] [2022-01-31 21:18:34,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [344801552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:34,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:34,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:34,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243787686] [2022-01-31 21:18:34,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:34,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:34,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:34,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:34,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:34,094 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:34,482 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:18:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:34,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:34,482 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:18:34,482 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:18:34,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:34,483 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:34,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:18:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 125. [2022-01-31 21:18:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-01-31 21:18:34,546 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 42 [2022-01-31 21:18:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:34,546 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-01-31 21:18:34,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-01-31 21:18:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:34,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:34,547 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:34,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 21:18:34,547 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:34,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:34,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2000709576, now seen corresponding path program 117 times [2022-01-31 21:18:34,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:34,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462715028] [2022-01-31 21:18:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:34,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:34,548 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:34,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:34,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:34,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:34,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:34,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462715028] [2022-01-31 21:18:34,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [462715028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:34,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:34,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:34,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125108792] [2022-01-31 21:18:34,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:34,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:34,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:34,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:34,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:34,699 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:35,024 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:18:35,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:35,025 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:18:35,025 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:18:35,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:35,025 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:35,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:35,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:18:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2022-01-31 21:18:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-01-31 21:18:35,090 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 42 [2022-01-31 21:18:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:35,090 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-01-31 21:18:35,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-01-31 21:18:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:35,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:35,091 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:35,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 21:18:35,091 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:35,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:35,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1226723144, now seen corresponding path program 118 times [2022-01-31 21:18:35,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:35,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460815218] [2022-01-31 21:18:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:35,092 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:35,092 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:35,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:35,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:35,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:35,257 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:35,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460815218] [2022-01-31 21:18:35,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1460815218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:35,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:35,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:35,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474898743] [2022-01-31 21:18:35,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:35,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:35,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:35,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:35,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:35,258 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:35,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:35,613 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:18:35,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:35,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:35,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:35,614 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:18:35,614 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:18:35,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:35,614 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:35,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:18:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 129. [2022-01-31 21:18:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-01-31 21:18:35,685 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 42 [2022-01-31 21:18:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:35,685 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-01-31 21:18:35,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-01-31 21:18:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:18:35,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:35,686 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:35,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 21:18:35,686 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash 455104200, now seen corresponding path program 119 times [2022-01-31 21:18:35,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:35,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172650814] [2022-01-31 21:18:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:35,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:35,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:35,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:35,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:35,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:35,889 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 21:18:35,890 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:35,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172650814] [2022-01-31 21:18:35,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172650814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:35,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:35,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:18:35,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202295274] [2022-01-31 21:18:35,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:35,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:18:35,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:35,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:18:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:18:35,891 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:36,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:36,277 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:18:36,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:18:36,277 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:18:36,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:36,278 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:18:36,278 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:18:36,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:18:36,278 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:36,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:18:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 103. [2022-01-31 21:18:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-01-31 21:18:36,328 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 42 [2022-01-31 21:18:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:36,328 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-01-31 21:18:36,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-01-31 21:18:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:36,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:36,329 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:36,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 21:18:36,329 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1027800363, now seen corresponding path program 120 times [2022-01-31 21:18:36,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:36,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327072555] [2022-01-31 21:18:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:36,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:36,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:36,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:36,333 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:36,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:36,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327072555] [2022-01-31 21:18:36,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [327072555] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:36,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:36,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:36,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872131390] [2022-01-31 21:18:36,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:36,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:36,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:36,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:36,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:36,502 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:36,863 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2022-01-31 21:18:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:36,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:36,864 INFO L225 Difference]: With dead ends: 118 [2022-01-31 21:18:36,864 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 21:18:36,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:36,864 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:36,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 21:18:36,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-01-31 21:18:36,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-01-31 21:18:36,916 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 44 [2022-01-31 21:18:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:36,916 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-01-31 21:18:36,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-01-31 21:18:36,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:36,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:36,917 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:36,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 21:18:36,917 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:36,917 INFO L85 PathProgramCache]: Analyzing trace with hash -67148629, now seen corresponding path program 121 times [2022-01-31 21:18:36,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:36,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266774054] [2022-01-31 21:18:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:36,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:36,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:36,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:36,920 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:37,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:37,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:37,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266774054] [2022-01-31 21:18:37,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1266774054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:37,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:37,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:37,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464583089] [2022-01-31 21:18:37,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:37,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:37,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:37,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:37,061 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:37,450 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-01-31 21:18:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:37,450 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:37,450 INFO L225 Difference]: With dead ends: 122 [2022-01-31 21:18:37,450 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:18:37,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:37,451 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:37,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:18:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2022-01-31 21:18:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-01-31 21:18:37,506 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 44 [2022-01-31 21:18:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:37,506 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-01-31 21:18:37,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-01-31 21:18:37,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:37,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:37,507 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:37,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 21:18:37,507 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:37,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:37,507 INFO L85 PathProgramCache]: Analyzing trace with hash -46142421, now seen corresponding path program 122 times [2022-01-31 21:18:37,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:37,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204578771] [2022-01-31 21:18:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:37,511 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:37,511 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:37,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:37,512 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:37,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:37,676 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204578771] [2022-01-31 21:18:37,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [204578771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:37,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:37,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:37,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515756694] [2022-01-31 21:18:37,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:37,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:37,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:37,677 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:38,014 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-01-31 21:18:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:38,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:38,014 INFO L225 Difference]: With dead ends: 128 [2022-01-31 21:18:38,014 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 21:18:38,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:38,015 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:38,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 21:18:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2022-01-31 21:18:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-01-31 21:18:38,076 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 44 [2022-01-31 21:18:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:38,091 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-01-31 21:18:38,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-01-31 21:18:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:38,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:38,092 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:38,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 21:18:38,093 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:38,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1334013013, now seen corresponding path program 123 times [2022-01-31 21:18:38,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:38,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572333212] [2022-01-31 21:18:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:38,096 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:38,096 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:38,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:38,097 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:38,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:38,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:38,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572333212] [2022-01-31 21:18:38,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [572333212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:38,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:38,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:38,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510813918] [2022-01-31 21:18:38,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:38,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:38,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:38,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:38,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:38,212 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:38,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:38,488 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-01-31 21:18:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:38,488 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:38,488 INFO L225 Difference]: With dead ends: 134 [2022-01-31 21:18:38,488 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 21:18:38,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:38,489 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:38,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 21:18:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2022-01-31 21:18:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-01-31 21:18:38,550 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 44 [2022-01-31 21:18:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:38,550 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-01-31 21:18:38,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-01-31 21:18:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:38,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:38,551 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:38,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 21:18:38,551 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:38,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2027070677, now seen corresponding path program 124 times [2022-01-31 21:18:38,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:38,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327276381] [2022-01-31 21:18:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:38,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:38,552 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:38,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:38,553 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:38,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:38,761 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 21:18:38,761 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:38,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327276381] [2022-01-31 21:18:38,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [327276381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:38,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:38,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:38,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820565527] [2022-01-31 21:18:38,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:38,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:38,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:38,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:38,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:38,762 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:39,118 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-01-31 21:18:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:39,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:39,119 INFO L225 Difference]: With dead ends: 140 [2022-01-31 21:18:39,119 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 21:18:39,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:39,119 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:39,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:39,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 21:18:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2022-01-31 21:18:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-01-31 21:18:39,181 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 44 [2022-01-31 21:18:39,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:39,182 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-01-31 21:18:39,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-01-31 21:18:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:39,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:39,182 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:39,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 21:18:39,182 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1959412395, now seen corresponding path program 125 times [2022-01-31 21:18:39,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:39,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928253732] [2022-01-31 21:18:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:39,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:39,185 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:39,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:39,185 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:39,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:39,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:39,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928253732] [2022-01-31 21:18:39,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928253732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:39,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:39,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:39,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006159498] [2022-01-31 21:18:39,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:39,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:39,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:39,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:39,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:39,328 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:39,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:39,715 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-01-31 21:18:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:39,715 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:18:39,715 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:18:39,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:39,716 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:39,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 15 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:39,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:18:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 119. [2022-01-31 21:18:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-01-31 21:18:39,785 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 44 [2022-01-31 21:18:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:39,785 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-01-31 21:18:39,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-01-31 21:18:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:39,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:39,786 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:39,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 21:18:39,786 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:39,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:39,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1858816555, now seen corresponding path program 126 times [2022-01-31 21:18:39,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:39,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322611876] [2022-01-31 21:18:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:39,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:39,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:39,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:39,788 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:39,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:39,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322611876] [2022-01-31 21:18:39,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [322611876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:39,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:39,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:39,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990679313] [2022-01-31 21:18:39,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:39,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:39,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:39,952 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:40,340 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-01-31 21:18:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:40,341 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:40,341 INFO L225 Difference]: With dead ends: 152 [2022-01-31 21:18:40,341 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:18:40,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:40,342 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:40,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 19 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:40,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:18:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2022-01-31 21:18:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-01-31 21:18:40,414 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 44 [2022-01-31 21:18:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:40,414 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-01-31 21:18:40,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-01-31 21:18:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:40,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:40,414 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:40,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 21:18:40,415 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash -324505173, now seen corresponding path program 127 times [2022-01-31 21:18:40,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:40,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002642104] [2022-01-31 21:18:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:40,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:40,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:40,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:40,417 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:40,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:40,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:40,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002642104] [2022-01-31 21:18:40,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002642104] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:40,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:40,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:40,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123294374] [2022-01-31 21:18:40,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:40,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:40,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:40,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:40,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:40,581 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:40,994 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-01-31 21:18:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:40,995 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:40,995 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:18:40,995 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:18:40,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:40,996 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:40,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:18:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 123. [2022-01-31 21:18:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-01-31 21:18:41,072 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 44 [2022-01-31 21:18:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:41,073 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-01-31 21:18:41,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-01-31 21:18:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:41,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:41,073 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:41,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 21:18:41,073 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1742321963, now seen corresponding path program 128 times [2022-01-31 21:18:41,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:41,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267937545] [2022-01-31 21:18:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:41,075 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:41,075 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:41,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:41,076 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:41,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:41,241 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:41,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267937545] [2022-01-31 21:18:41,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267937545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:41,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:41,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:41,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062906926] [2022-01-31 21:18:41,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:41,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:41,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:41,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:41,242 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:41,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:41,668 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:18:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:41,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:41,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:41,668 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:18:41,668 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:18:41,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:41,669 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:41,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 25 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:18:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 125. [2022-01-31 21:18:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-01-31 21:18:41,738 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 44 [2022-01-31 21:18:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:41,738 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-01-31 21:18:41,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-01-31 21:18:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:41,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:41,739 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:41,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 21:18:41,739 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash -606658389, now seen corresponding path program 129 times [2022-01-31 21:18:41,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:41,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308884770] [2022-01-31 21:18:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:41,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:41,740 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:41,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:41,741 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:41,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:41,900 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 21:18:41,900 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:41,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308884770] [2022-01-31 21:18:41,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308884770] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:41,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:41,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:41,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702216343] [2022-01-31 21:18:41,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:41,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:41,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:41,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:41,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:41,901 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:42,247 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:18:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:42,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:42,248 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:18:42,248 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:18:42,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:42,248 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:42,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:18:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 127. [2022-01-31 21:18:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-01-31 21:18:42,318 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 44 [2022-01-31 21:18:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:42,319 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-01-31 21:18:42,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-01-31 21:18:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:42,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:42,319 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:42,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 21:18:42,319 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:42,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1176021035, now seen corresponding path program 130 times [2022-01-31 21:18:42,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:42,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509667686] [2022-01-31 21:18:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:42,320 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:42,320 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:42,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:42,321 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:42,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:42,425 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:42,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509667686] [2022-01-31 21:18:42,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [509667686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:42,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:42,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:42,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95856777] [2022-01-31 21:18:42,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:42,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:42,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:42,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:42,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:42,426 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:42,824 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:18:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:42,824 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:42,825 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:18:42,825 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:18:42,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:42,825 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:42,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:42,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:18:42,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 129. [2022-01-31 21:18:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-01-31 21:18:42,898 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 44 [2022-01-31 21:18:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:42,898 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-01-31 21:18:42,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-01-31 21:18:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:42,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:42,898 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:42,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 21:18:42,898 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:42,899 INFO L85 PathProgramCache]: Analyzing trace with hash 638996395, now seen corresponding path program 131 times [2022-01-31 21:18:42,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:42,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805308723] [2022-01-31 21:18:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:42,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:42,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:42,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:42,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:43,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:43,068 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 21:18:43,068 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805308723] [2022-01-31 21:18:43,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [805308723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:43,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:43,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:43,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165694290] [2022-01-31 21:18:43,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:43,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:43,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:43,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:43,069 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:43,498 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:18:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:43,498 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:43,498 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:18:43,498 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:18:43,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:43,499 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:43,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:18:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2022-01-31 21:18:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-01-31 21:18:43,576 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 44 [2022-01-31 21:18:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:43,577 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-01-31 21:18:43,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-01-31 21:18:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:43,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:43,577 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:43,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 21:18:43,577 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:43,577 INFO L85 PathProgramCache]: Analyzing trace with hash -45607125, now seen corresponding path program 132 times [2022-01-31 21:18:43,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:43,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339996984] [2022-01-31 21:18:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:43,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:43,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:43,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:43,579 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:43,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:43,742 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:43,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339996984] [2022-01-31 21:18:43,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1339996984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:43,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:43,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:43,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857960750] [2022-01-31 21:18:43,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:43,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:43,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:43,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:43,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:43,742 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:44,169 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:18:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:44,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:44,170 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:18:44,170 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:18:44,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:44,170 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:44,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:18:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 133. [2022-01-31 21:18:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-01-31 21:18:44,246 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 44 [2022-01-31 21:18:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:44,246 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-01-31 21:18:44,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-01-31 21:18:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:44,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:44,246 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:44,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 21:18:44,246 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:44,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash -819593557, now seen corresponding path program 133 times [2022-01-31 21:18:44,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:44,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841866060] [2022-01-31 21:18:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:44,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:44,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:44,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:44,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:44,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:44,352 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:44,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841866060] [2022-01-31 21:18:44,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [841866060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:44,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:44,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:44,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123858081] [2022-01-31 21:18:44,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:44,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:44,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:44,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:44,353 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:44,689 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:18:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:44,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:44,689 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:18:44,689 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:18:44,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:44,691 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:44,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:18:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 135. [2022-01-31 21:18:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-01-31 21:18:44,769 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 44 [2022-01-31 21:18:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:44,769 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-01-31 21:18:44,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-01-31 21:18:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:44,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:44,769 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:44,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 21:18:44,770 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1591212501, now seen corresponding path program 134 times [2022-01-31 21:18:44,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:44,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078172213] [2022-01-31 21:18:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:44,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:44,771 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:44,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:44,771 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:44,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:44,937 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 21:18:44,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:44,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078172213] [2022-01-31 21:18:44,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078172213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:44,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:44,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:44,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834538173] [2022-01-31 21:18:44,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:44,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:44,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:44,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:44,938 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:45,360 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:18:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:45,360 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:45,361 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:18:45,361 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:18:45,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:45,361 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:45,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:18:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 137. [2022-01-31 21:18:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-01-31 21:18:45,438 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 44 [2022-01-31 21:18:45,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:45,438 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-01-31 21:18:45,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-01-31 21:18:45,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:18:45,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:45,438 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:45,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 21:18:45,438 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:45,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:45,439 INFO L85 PathProgramCache]: Analyzing trace with hash -87675477, now seen corresponding path program 135 times [2022-01-31 21:18:45,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:45,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788937285] [2022-01-31 21:18:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:45,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:45,440 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:45,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:45,440 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:45,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:45,599 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 21:18:45,599 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:45,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788937285] [2022-01-31 21:18:45,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [788937285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:45,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:45,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:18:45,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438294443] [2022-01-31 21:18:45,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:45,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:18:45,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:45,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:18:45,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:18:45,600 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:45,987 INFO L93 Difference]: Finished difference Result 174 states and 251 transitions. [2022-01-31 21:18:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:18:45,987 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:18:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:45,988 INFO L225 Difference]: With dead ends: 174 [2022-01-31 21:18:45,988 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 21:18:45,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:18:45,988 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:45,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 21:18:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 109. [2022-01-31 21:18:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-01-31 21:18:46,045 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 44 [2022-01-31 21:18:46,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:46,045 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-01-31 21:18:46,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-01-31 21:18:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:46,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:46,045 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:46,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 21:18:46,046 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1612472270, now seen corresponding path program 136 times [2022-01-31 21:18:46,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:46,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106657267] [2022-01-31 21:18:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:46,047 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:46,047 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:46,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:46,047 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:46,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:46,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:46,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106657267] [2022-01-31 21:18:46,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2106657267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:46,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:46,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:46,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418745601] [2022-01-31 21:18:46,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:46,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:46,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:46,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:46,195 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:46,577 INFO L93 Difference]: Finished difference Result 124 states and 177 transitions. [2022-01-31 21:18:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:46,577 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:46,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:46,578 INFO L225 Difference]: With dead ends: 124 [2022-01-31 21:18:46,578 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 21:18:46,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:46,579 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:46,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 25 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 21:18:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2022-01-31 21:18:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-01-31 21:18:46,647 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 46 [2022-01-31 21:18:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:46,647 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-01-31 21:18:46,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-01-31 21:18:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:46,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:46,648 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:46,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 21:18:46,648 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:46,648 INFO L85 PathProgramCache]: Analyzing trace with hash 517523278, now seen corresponding path program 137 times [2022-01-31 21:18:46,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:46,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651952619] [2022-01-31 21:18:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:46,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:46,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:46,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:46,650 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:46,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:46,828 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:46,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651952619] [2022-01-31 21:18:46,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [651952619] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:46,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:46,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:46,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30698560] [2022-01-31 21:18:46,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:46,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:46,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:46,829 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:47,242 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-01-31 21:18:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:47,242 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:47,243 INFO L225 Difference]: With dead ends: 128 [2022-01-31 21:18:47,243 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 21:18:47,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:47,243 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:47,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 23 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 21:18:47,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2022-01-31 21:18:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-01-31 21:18:47,310 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 46 [2022-01-31 21:18:47,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:47,310 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-01-31 21:18:47,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:47,310 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-01-31 21:18:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:47,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:47,311 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:47,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 21:18:47,311 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:47,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash 538529486, now seen corresponding path program 138 times [2022-01-31 21:18:47,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:47,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674866371] [2022-01-31 21:18:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:47,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:47,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:47,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:47,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:47,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:47,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:47,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674866371] [2022-01-31 21:18:47,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674866371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:47,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:47,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:47,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280386080] [2022-01-31 21:18:47,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:47,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:47,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:47,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:47,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:47,510 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:47,928 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-01-31 21:18:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:47,929 INFO L225 Difference]: With dead ends: 134 [2022-01-31 21:18:47,929 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 21:18:47,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:47,930 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:47,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 21:18:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2022-01-31 21:18:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-01-31 21:18:47,996 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 46 [2022-01-31 21:18:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:47,996 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-01-31 21:18:47,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-01-31 21:18:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:47,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:47,997 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:47,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 21:18:47,997 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:47,997 INFO L85 PathProgramCache]: Analyzing trace with hash -749341106, now seen corresponding path program 139 times [2022-01-31 21:18:47,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:47,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415228489] [2022-01-31 21:18:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:47,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:47,998 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:47,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:47,999 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:48,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:48,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415228489] [2022-01-31 21:18:48,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1415228489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:48,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:48,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:48,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592414947] [2022-01-31 21:18:48,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:48,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:48,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:48,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:48,163 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:48,525 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-01-31 21:18:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:48,525 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:48,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:48,525 INFO L225 Difference]: With dead ends: 140 [2022-01-31 21:18:48,525 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 21:18:48,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:48,526 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:48,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 15 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:48,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 21:18:48,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2022-01-31 21:18:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-01-31 21:18:48,594 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 46 [2022-01-31 21:18:48,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:48,594 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-01-31 21:18:48,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-01-31 21:18:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:48,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:48,595 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:48,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 21:18:48,595 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:48,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1442398770, now seen corresponding path program 140 times [2022-01-31 21:18:48,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:48,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007750220] [2022-01-31 21:18:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:48,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:48,596 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:48,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:48,597 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:48,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:48,769 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 21:18:48,769 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:48,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007750220] [2022-01-31 21:18:48,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007750220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:48,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:48,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:48,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449298357] [2022-01-31 21:18:48,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:48,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:48,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:48,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:48,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:48,770 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:49,197 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-01-31 21:18:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:49,197 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:49,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:49,198 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:18:49,198 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:18:49,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:49,198 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:49,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:18:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2022-01-31 21:18:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-01-31 21:18:49,268 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 46 [2022-01-31 21:18:49,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:49,269 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-01-31 21:18:49,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:49,269 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-01-31 21:18:49,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:49,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:49,269 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:49,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 21:18:49,269 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:49,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1750882994, now seen corresponding path program 141 times [2022-01-31 21:18:49,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:49,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635227756] [2022-01-31 21:18:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:49,270 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:49,270 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:49,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:49,271 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:49,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:49,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:49,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635227756] [2022-01-31 21:18:49,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [635227756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:49,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:49,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:49,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829395138] [2022-01-31 21:18:49,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:49,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:49,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:49,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:49,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:49,448 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:49,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:49,888 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-01-31 21:18:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:49,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:49,889 INFO L225 Difference]: With dead ends: 152 [2022-01-31 21:18:49,889 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:18:49,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:49,889 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:49,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:49,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:18:49,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 125. [2022-01-31 21:18:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-01-31 21:18:49,962 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 46 [2022-01-31 21:18:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:49,962 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-01-31 21:18:49,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-01-31 21:18:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:49,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:49,962 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:49,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 21:18:49,963 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1851478834, now seen corresponding path program 142 times [2022-01-31 21:18:49,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:49,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96551390] [2022-01-31 21:18:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:49,964 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:49,964 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:49,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:49,964 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:50,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:50,139 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:50,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96551390] [2022-01-31 21:18:50,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [96551390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:50,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:50,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:50,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352194980] [2022-01-31 21:18:50,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:50,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:50,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:50,140 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:50,581 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-01-31 21:18:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:50,581 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:18:50,581 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:18:50,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:50,582 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:50,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:18:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2022-01-31 21:18:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-01-31 21:18:50,662 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 46 [2022-01-31 21:18:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:50,662 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-01-31 21:18:50,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-01-31 21:18:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:50,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:50,663 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:50,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 21:18:50,663 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash 260166734, now seen corresponding path program 143 times [2022-01-31 21:18:50,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:50,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810204218] [2022-01-31 21:18:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:50,664 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:50,664 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:50,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:50,664 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:50,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:50,840 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 21:18:50,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:50,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810204218] [2022-01-31 21:18:50,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1810204218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:50,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:50,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:50,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015719973] [2022-01-31 21:18:50,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:50,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:50,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:50,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:50,841 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:51,314 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:18:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:51,315 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:51,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:51,315 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:18:51,315 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:18:51,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:51,316 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:51,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 22 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:18:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2022-01-31 21:18:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-01-31 21:18:51,399 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 46 [2022-01-31 21:18:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:51,399 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-01-31 21:18:51,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:51,399 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-01-31 21:18:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:51,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:51,400 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:51,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 21:18:51,400 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:51,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:51,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1967973426, now seen corresponding path program 144 times [2022-01-31 21:18:51,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:51,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204039440] [2022-01-31 21:18:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:51,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:51,401 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:51,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:51,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:51,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:51,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:51,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204039440] [2022-01-31 21:18:51,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1204039440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:51,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:51,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:51,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266551603] [2022-01-31 21:18:51,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:51,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:51,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:51,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:51,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:51,579 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:51,988 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:18:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:51,989 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:18:51,989 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:18:51,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:51,989 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:51,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:18:52,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 131. [2022-01-31 21:18:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-01-31 21:18:52,079 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 46 [2022-01-31 21:18:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:52,079 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-01-31 21:18:52,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-01-31 21:18:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:52,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:52,080 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:52,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 21:18:52,080 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:52,080 INFO L85 PathProgramCache]: Analyzing trace with hash -21986482, now seen corresponding path program 145 times [2022-01-31 21:18:52,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:52,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312821480] [2022-01-31 21:18:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:52,081 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:52,081 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:52,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:52,082 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:52,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:52,204 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 21:18:52,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:52,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312821480] [2022-01-31 21:18:52,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [312821480] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:52,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:52,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:52,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752602216] [2022-01-31 21:18:52,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:52,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:52,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:52,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:52,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:52,205 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:52,546 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:18:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:52,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:52,547 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:18:52,547 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:18:52,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:52,547 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:52,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:18:52,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 133. [2022-01-31 21:18:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-01-31 21:18:52,633 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 46 [2022-01-31 21:18:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:52,633 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-01-31 21:18:52,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-01-31 21:18:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:52,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:52,633 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:52,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 21:18:52,633 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1760692942, now seen corresponding path program 146 times [2022-01-31 21:18:52,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:52,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654694936] [2022-01-31 21:18:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:52,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:52,635 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:52,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:52,635 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:52,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:52,824 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 21:18:52,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:52,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654694936] [2022-01-31 21:18:52,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1654694936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:52,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:52,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:52,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684281900] [2022-01-31 21:18:52,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:52,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:52,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:52,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:52,825 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:53,296 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:18:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:53,296 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:18:53,297 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:18:53,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:53,297 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:53,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:18:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 135. [2022-01-31 21:18:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-01-31 21:18:53,386 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 46 [2022-01-31 21:18:53,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:53,386 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-01-31 21:18:53,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-01-31 21:18:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:53,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:53,387 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:53,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 21:18:53,387 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1223668302, now seen corresponding path program 147 times [2022-01-31 21:18:53,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:53,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626787329] [2022-01-31 21:18:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:53,388 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:53,388 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:53,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:53,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:53,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:53,564 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:53,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626787329] [2022-01-31 21:18:53,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1626787329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:53,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:53,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:53,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978896826] [2022-01-31 21:18:53,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:53,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:53,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:53,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:53,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:53,565 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:53,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:53,981 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:18:53,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:53,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:53,982 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:18:53,982 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:18:53,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:53,982 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:53,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 23 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:18:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 137. [2022-01-31 21:18:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-01-31 21:18:54,068 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 46 [2022-01-31 21:18:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:54,068 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-01-31 21:18:54,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-01-31 21:18:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:54,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:54,069 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:54,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 21:18:54,069 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash 539064782, now seen corresponding path program 148 times [2022-01-31 21:18:54,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:54,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306051417] [2022-01-31 21:18:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:54,070 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:54,070 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:54,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:54,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:54,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:54,261 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 21:18:54,262 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:54,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306051417] [2022-01-31 21:18:54,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306051417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:54,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:54,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:54,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800694228] [2022-01-31 21:18:54,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:54,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:54,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:54,263 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:54,742 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:18:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:54,742 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:54,742 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:18:54,742 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:18:54,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:54,743 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:54,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:18:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 139. [2022-01-31 21:18:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-01-31 21:18:54,832 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 46 [2022-01-31 21:18:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:54,832 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-01-31 21:18:54,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-01-31 21:18:54,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:54,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:54,833 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:54,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-01-31 21:18:54,833 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:54,833 INFO L85 PathProgramCache]: Analyzing trace with hash -234921650, now seen corresponding path program 149 times [2022-01-31 21:18:54,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:54,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716545668] [2022-01-31 21:18:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:54,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:54,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:54,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:54,835 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:55,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:55,012 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:55,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716545668] [2022-01-31 21:18:55,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [716545668] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:55,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:55,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:55,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624685977] [2022-01-31 21:18:55,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:55,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:55,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:55,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:55,013 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:55,500 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:18:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:55,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:55,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:55,501 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:18:55,501 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:18:55,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:55,501 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:55,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 23 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:18:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 141. [2022-01-31 21:18:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-01-31 21:18:55,591 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 46 [2022-01-31 21:18:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:55,591 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-01-31 21:18:55,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-01-31 21:18:55,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:55,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:55,591 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:55,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-01-31 21:18:55,591 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1006540594, now seen corresponding path program 150 times [2022-01-31 21:18:55,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:55,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784996550] [2022-01-31 21:18:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:55,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:55,593 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:55,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:55,593 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:55,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:55,769 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 21:18:55,769 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784996550] [2022-01-31 21:18:55,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784996550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:55,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:55,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:55,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628037334] [2022-01-31 21:18:55,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:55,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:55,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:55,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:55,770 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:56,249 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:18:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:56,250 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:56,250 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:18:56,250 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:18:56,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:56,251 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:56,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:56,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:18:56,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2022-01-31 21:18:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-01-31 21:18:56,342 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 46 [2022-01-31 21:18:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:56,343 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-01-31 21:18:56,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-01-31 21:18:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:56,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:56,343 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:56,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-01-31 21:18:56,343 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:56,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:56,343 INFO L85 PathProgramCache]: Analyzing trace with hash 496996430, now seen corresponding path program 151 times [2022-01-31 21:18:56,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:56,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583316820] [2022-01-31 21:18:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:56,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:56,344 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:56,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:56,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:56,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:56,522 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:56,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583316820] [2022-01-31 21:18:56,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583316820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:56,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:56,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:56,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795826007] [2022-01-31 21:18:56,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:56,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:56,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:56,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:56,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:56,523 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:56,936 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:18:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:56,936 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:56,936 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:18:56,937 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:18:56,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:56,937 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:56,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:18:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 145. [2022-01-31 21:18:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:57,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-01-31 21:18:57,033 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 46 [2022-01-31 21:18:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:57,033 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-01-31 21:18:57,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-01-31 21:18:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:18:57,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:57,034 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:57,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-01-31 21:18:57,034 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:57,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2007902258, now seen corresponding path program 152 times [2022-01-31 21:18:57,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:57,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198618215] [2022-01-31 21:18:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:57,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:57,036 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:57,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:57,036 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:57,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:57,223 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:57,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198618215] [2022-01-31 21:18:57,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1198618215] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:57,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:57,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:18:57,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818414473] [2022-01-31 21:18:57,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:57,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:18:57,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:57,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:18:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:18:57,224 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:57,676 INFO L93 Difference]: Finished difference Result 184 states and 266 transitions. [2022-01-31 21:18:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:18:57,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:18:57,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:57,677 INFO L225 Difference]: With dead ends: 184 [2022-01-31 21:18:57,677 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 21:18:57,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:18:57,678 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:57,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 21:18:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 115. [2022-01-31 21:18:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:57,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-01-31 21:18:57,751 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 46 [2022-01-31 21:18:57,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:57,751 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-01-31 21:18:57,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:57,752 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-01-31 21:18:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:18:57,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:57,752 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:57,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-01-31 21:18:57,752 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:57,752 INFO L85 PathProgramCache]: Analyzing trace with hash 841459121, now seen corresponding path program 153 times [2022-01-31 21:18:57,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:57,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284029693] [2022-01-31 21:18:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:57,753 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:57,753 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:57,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:57,754 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:57,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:57,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:57,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284029693] [2022-01-31 21:18:57,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284029693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:57,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:57,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:18:57,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647872089] [2022-01-31 21:18:57,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:57,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:18:57,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:57,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:18:57,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:18:57,946 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:58,406 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2022-01-31 21:18:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:18:58,406 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:18:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:58,407 INFO L225 Difference]: With dead ends: 130 [2022-01-31 21:18:58,407 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 21:18:58,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:18:58,426 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:58,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 21 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 21:18:58,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-01-31 21:18:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-01-31 21:18:58,497 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 48 [2022-01-31 21:18:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:58,497 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-01-31 21:18:58,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-01-31 21:18:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:18:58,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:58,498 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:58,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-01-31 21:18:58,498 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:58,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:58,498 INFO L85 PathProgramCache]: Analyzing trace with hash -253489871, now seen corresponding path program 154 times [2022-01-31 21:18:58,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:58,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137689458] [2022-01-31 21:18:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:58,499 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:58,499 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:58,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:58,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:58,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:58,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:58,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137689458] [2022-01-31 21:18:58,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1137689458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:58,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:58,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:18:58,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901780179] [2022-01-31 21:18:58,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:58,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:18:58,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:18:58,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:18:58,706 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:59,072 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-01-31 21:18:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:18:59,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:18:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:59,072 INFO L225 Difference]: With dead ends: 134 [2022-01-31 21:18:59,072 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 21:18:59,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:18:59,073 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:59,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 23 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 21:18:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-01-31 21:18:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-01-31 21:18:59,147 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 48 [2022-01-31 21:18:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:59,147 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-01-31 21:18:59,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-01-31 21:18:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:18:59,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:59,148 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:59,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-01-31 21:18:59,148 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -232483663, now seen corresponding path program 155 times [2022-01-31 21:18:59,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:59,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684275437] [2022-01-31 21:18:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:59,149 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:59,149 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:59,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:59,150 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:59,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:59,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:59,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684275437] [2022-01-31 21:18:59,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [684275437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:59,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:59,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:18:59,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382294667] [2022-01-31 21:18:59,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:59,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:18:59,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:59,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:18:59,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:18:59,265 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:59,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:18:59,586 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-01-31 21:18:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:18:59,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:18:59,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:18:59,587 INFO L225 Difference]: With dead ends: 140 [2022-01-31 21:18:59,587 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 21:18:59,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:18:59,588 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:18:59,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:18:59,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 21:18:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2022-01-31 21:18:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-01-31 21:18:59,664 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 48 [2022-01-31 21:18:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:18:59,664 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-01-31 21:18:59,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:18:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-01-31 21:18:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:18:59,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:18:59,665 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:18:59,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-01-31 21:18:59,665 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:18:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:18:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1520354255, now seen corresponding path program 156 times [2022-01-31 21:18:59,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:18:59,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139353653] [2022-01-31 21:18:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:18:59,666 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:18:59,666 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:18:59,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:18:59,667 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:18:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:59,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:18:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:18:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:18:59,784 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:18:59,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139353653] [2022-01-31 21:18:59,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1139353653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:18:59,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:18:59,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:18:59,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584532420] [2022-01-31 21:18:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:18:59,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:18:59,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:18:59,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:18:59,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:18:59,785 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:00,207 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-01-31 21:19:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:00,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:00,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:00,208 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:19:00,208 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:19:00,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:00,208 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:00,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:19:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 127. [2022-01-31 21:19:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-01-31 21:19:00,289 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 48 [2022-01-31 21:19:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:00,290 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-01-31 21:19:00,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-01-31 21:19:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:00,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:00,290 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:00,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-01-31 21:19:00,290 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:00,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2081555377, now seen corresponding path program 157 times [2022-01-31 21:19:00,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:00,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899322442] [2022-01-31 21:19:00,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:00,291 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:00,291 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:00,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:00,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:00,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:00,483 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:00,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899322442] [2022-01-31 21:19:00,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [899322442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:00,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:00,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:00,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592683257] [2022-01-31 21:19:00,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:00,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:00,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:00,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:00,484 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:00,965 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-01-31 21:19:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:00,965 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:00,966 INFO L225 Difference]: With dead ends: 152 [2022-01-31 21:19:00,966 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:19:00,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:00,966 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:00,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:19:01,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 129. [2022-01-31 21:19:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-01-31 21:19:01,049 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 48 [2022-01-31 21:19:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:01,050 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-01-31 21:19:01,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-01-31 21:19:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:01,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:01,050 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:01,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-01-31 21:19:01,050 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:01,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1773071153, now seen corresponding path program 158 times [2022-01-31 21:19:01,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:01,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167111694] [2022-01-31 21:19:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:01,051 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:01,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:01,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:01,052 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:01,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:01,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:01,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167111694] [2022-01-31 21:19:01,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167111694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:01,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:01,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:01,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158583786] [2022-01-31 21:19:01,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:01,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:01,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:01,247 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:01,740 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-01-31 21:19:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:01,741 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:01,741 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:19:01,741 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:19:01,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:01,742 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:01,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 23 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:19:01,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 131. [2022-01-31 21:19:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-01-31 21:19:01,828 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 48 [2022-01-31 21:19:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:01,828 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-01-31 21:19:01,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-01-31 21:19:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:01,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:01,829 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:01,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-01-31 21:19:01,829 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:01,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1672475313, now seen corresponding path program 159 times [2022-01-31 21:19:01,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:01,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422072592] [2022-01-31 21:19:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:01,830 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:01,830 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:01,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:01,831 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:02,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:02,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:02,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422072592] [2022-01-31 21:19:02,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [422072592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:02,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:02,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:02,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60460217] [2022-01-31 21:19:02,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:02,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:02,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:02,023 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:02,508 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:19:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:02,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:02,509 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:19:02,509 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:19:02,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:02,509 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:02,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:19:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-01-31 21:19:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-01-31 21:19:02,596 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 48 [2022-01-31 21:19:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:02,597 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-01-31 21:19:02,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-01-31 21:19:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:02,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:02,597 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:02,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-01-31 21:19:02,597 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:02,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:02,597 INFO L85 PathProgramCache]: Analyzing trace with hash -510846415, now seen corresponding path program 160 times [2022-01-31 21:19:02,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:02,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144640216] [2022-01-31 21:19:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:02,598 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:02,598 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:02,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:02,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:02,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:02,785 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 21:19:02,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:02,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144640216] [2022-01-31 21:19:02,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [144640216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:02,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:02,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:02,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036316634] [2022-01-31 21:19:02,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:02,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:02,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:02,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:02,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:02,786 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:03,189 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:19:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:03,189 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:19:03,189 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:19:03,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:03,190 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:03,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:19:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 135. [2022-01-31 21:19:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-01-31 21:19:03,279 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 48 [2022-01-31 21:19:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:03,279 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-01-31 21:19:03,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-01-31 21:19:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:03,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:03,279 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:03,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-01-31 21:19:03,279 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:03,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1555980721, now seen corresponding path program 161 times [2022-01-31 21:19:03,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:03,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807932090] [2022-01-31 21:19:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:03,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:03,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:03,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:03,281 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:03,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:03,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:03,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807932090] [2022-01-31 21:19:03,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [807932090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:03,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:03,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:03,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666940630] [2022-01-31 21:19:03,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:03,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:03,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:03,468 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:03,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:03,865 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:19:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:03,865 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:03,865 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:19:03,865 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:19:03,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:03,866 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:03,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:03,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:19:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2022-01-31 21:19:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-01-31 21:19:03,958 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 48 [2022-01-31 21:19:03,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:03,958 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-01-31 21:19:03,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-01-31 21:19:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:03,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:03,959 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:03,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-01-31 21:19:03,959 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:03,959 INFO L85 PathProgramCache]: Analyzing trace with hash -792999631, now seen corresponding path program 162 times [2022-01-31 21:19:03,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:03,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310300564] [2022-01-31 21:19:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:03,960 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:03,960 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:03,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:03,961 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:04,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:04,091 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:04,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310300564] [2022-01-31 21:19:04,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310300564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:04,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:04,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:04,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408520549] [2022-01-31 21:19:04,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:04,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:04,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:04,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:04,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:04,092 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:04,461 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:19:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:04,462 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:19:04,462 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:19:04,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:04,462 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:04,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:19:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 139. [2022-01-31 21:19:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-01-31 21:19:04,561 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 48 [2022-01-31 21:19:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:04,561 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-01-31 21:19:04,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-01-31 21:19:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:04,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:04,561 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:04,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-01-31 21:19:04,561 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:04,562 INFO L85 PathProgramCache]: Analyzing trace with hash 989679793, now seen corresponding path program 163 times [2022-01-31 21:19:04,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:04,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751160795] [2022-01-31 21:19:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:04,563 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:04,563 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:04,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:04,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:04,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:04,675 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:04,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751160795] [2022-01-31 21:19:04,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [751160795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:04,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:04,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:04,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357758615] [2022-01-31 21:19:04,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:04,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:04,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:04,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:04,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:04,676 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:05,051 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:19:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:05,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:05,052 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:19:05,052 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:19:05,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:05,052 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:05,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:19:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 141. [2022-01-31 21:19:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-01-31 21:19:05,154 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 48 [2022-01-31 21:19:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:05,155 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-01-31 21:19:05,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-01-31 21:19:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:05,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:05,155 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:05,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-01-31 21:19:05,155 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:05,155 INFO L85 PathProgramCache]: Analyzing trace with hash 452655153, now seen corresponding path program 164 times [2022-01-31 21:19:05,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:05,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910903372] [2022-01-31 21:19:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:05,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:05,156 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:05,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:05,157 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:05,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:05,375 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 21:19:05,375 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:05,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910903372] [2022-01-31 21:19:05,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910903372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:05,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:05,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:05,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826588587] [2022-01-31 21:19:05,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:05,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:05,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:05,376 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:05,854 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:19:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:05,855 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:05,855 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:19:05,855 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:19:05,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:05,856 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:05,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:19:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 143. [2022-01-31 21:19:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-01-31 21:19:05,975 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 48 [2022-01-31 21:19:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:05,975 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-01-31 21:19:05,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-01-31 21:19:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:05,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:05,975 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:05,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-01-31 21:19:05,975 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:05,976 INFO L85 PathProgramCache]: Analyzing trace with hash -231948367, now seen corresponding path program 165 times [2022-01-31 21:19:05,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:05,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566252845] [2022-01-31 21:19:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:05,977 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:05,977 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:05,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:05,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:06,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:06,109 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:06,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566252845] [2022-01-31 21:19:06,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [566252845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:06,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:06,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:06,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298828785] [2022-01-31 21:19:06,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:06,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:06,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:06,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:06,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:06,110 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:06,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:06,535 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:19:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:06,536 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:19:06,536 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:19:06,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:06,537 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:06,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 23 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:19:06,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 145. [2022-01-31 21:19:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-01-31 21:19:06,640 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 48 [2022-01-31 21:19:06,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:06,640 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-01-31 21:19:06,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:06,640 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-01-31 21:19:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:06,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:06,641 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:06,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-01-31 21:19:06,641 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:06,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1005934799, now seen corresponding path program 166 times [2022-01-31 21:19:06,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:06,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416167958] [2022-01-31 21:19:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:06,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:06,642 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:06,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:06,643 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:06,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:06,786 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416167958] [2022-01-31 21:19:06,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1416167958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:06,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:06,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:06,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894580452] [2022-01-31 21:19:06,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:06,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:06,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:06,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:06,787 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:07,191 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:19:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:07,192 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:19:07,192 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:19:07,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:07,192 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:07,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 17 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:19:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2022-01-31 21:19:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-01-31 21:19:07,300 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 48 [2022-01-31 21:19:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:07,300 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-01-31 21:19:07,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-01-31 21:19:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:07,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:07,301 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:07,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-01-31 21:19:07,301 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1777553743, now seen corresponding path program 167 times [2022-01-31 21:19:07,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:07,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338052471] [2022-01-31 21:19:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:07,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:07,302 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:07,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:07,302 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:07,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:07,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:07,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338052471] [2022-01-31 21:19:07,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1338052471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:07,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:07,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:07,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348091487] [2022-01-31 21:19:07,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:07,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:07,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:07,416 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:07,809 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:19:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:07,809 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:07,809 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:19:07,809 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:19:07,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:07,810 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:07,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 25 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:19:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 149. [2022-01-31 21:19:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-01-31 21:19:07,919 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 48 [2022-01-31 21:19:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:07,919 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-01-31 21:19:07,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-01-31 21:19:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:07,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:07,920 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:07,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2022-01-31 21:19:07,920 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash -274016719, now seen corresponding path program 168 times [2022-01-31 21:19:07,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:07,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961812384] [2022-01-31 21:19:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:07,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:07,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:07,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:07,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:08,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:08,091 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:08,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961812384] [2022-01-31 21:19:08,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [961812384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:08,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:08,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:08,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520363055] [2022-01-31 21:19:08,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:08,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:08,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:08,092 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:08,579 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:19:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:08,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:08,580 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:19:08,580 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:19:08,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:08,580 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:08,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:19:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 151. [2022-01-31 21:19:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-01-31 21:19:08,686 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 48 [2022-01-31 21:19:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:08,686 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-01-31 21:19:08,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-01-31 21:19:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:08,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:08,687 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:08,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-01-31 21:19:08,687 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1516051889, now seen corresponding path program 169 times [2022-01-31 21:19:08,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:08,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034636345] [2022-01-31 21:19:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:08,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:08,688 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:08,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:08,689 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:08,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:08,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:08,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034636345] [2022-01-31 21:19:08,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034636345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:08,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:08,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:08,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077235179] [2022-01-31 21:19:08,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:08,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:08,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:08,860 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:09,344 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:19:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:09,344 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:09,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:09,345 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:19:09,345 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:19:09,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:09,345 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:09,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:19:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 153. [2022-01-31 21:19:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-01-31 21:19:09,455 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 48 [2022-01-31 21:19:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:09,455 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-01-31 21:19:09,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-01-31 21:19:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:19:09,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:09,456 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:09,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-01-31 21:19:09,456 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash -509901519, now seen corresponding path program 170 times [2022-01-31 21:19:09,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:09,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666492526] [2022-01-31 21:19:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:09,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:09,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:09,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:09,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:09,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:09,620 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:09,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666492526] [2022-01-31 21:19:09,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1666492526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:09,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:09,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:19:09,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808340854] [2022-01-31 21:19:09,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:09,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:19:09,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:19:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:19:09,621 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:10,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:10,087 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:19:10,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:19:10,088 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:19:10,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:10,088 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:19:10,088 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:19:10,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:19:10,089 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:10,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 17 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:19:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 121. [2022-01-31 21:19:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-01-31 21:19:10,178 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 48 [2022-01-31 21:19:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:10,178 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-01-31 21:19:10,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-01-31 21:19:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:10,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:10,179 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:10,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2022-01-31 21:19:10,179 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:10,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:10,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1367802156, now seen corresponding path program 171 times [2022-01-31 21:19:10,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:10,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907559604] [2022-01-31 21:19:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:10,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:10,187 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:10,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:10,188 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:10,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:10,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907559604] [2022-01-31 21:19:10,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [907559604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:10,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:10,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:10,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180271625] [2022-01-31 21:19:10,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:10,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:10,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:10,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:10,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:10,373 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:10,874 INFO L93 Difference]: Finished difference Result 136 states and 195 transitions. [2022-01-31 21:19:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:10,874 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:10,874 INFO L225 Difference]: With dead ends: 136 [2022-01-31 21:19:10,874 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 21:19:10,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:10,875 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:10,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 21 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 21:19:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-01-31 21:19:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-01-31 21:19:10,965 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 50 [2022-01-31 21:19:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:10,966 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-01-31 21:19:10,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-01-31 21:19:10,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:10,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:10,967 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:10,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2022-01-31 21:19:10,967 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:10,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1832216148, now seen corresponding path program 172 times [2022-01-31 21:19:10,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:10,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924387850] [2022-01-31 21:19:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:10,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:10,971 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:10,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:10,971 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:11,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:11,182 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:11,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924387850] [2022-01-31 21:19:11,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [924387850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:11,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:11,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:11,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911965892] [2022-01-31 21:19:11,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:11,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:11,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:11,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:11,183 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:11,678 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-01-31 21:19:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:11,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:11,679 INFO L225 Difference]: With dead ends: 140 [2022-01-31 21:19:11,679 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 21:19:11,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:11,680 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:11,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 21:19:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-01-31 21:19:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-01-31 21:19:11,772 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 50 [2022-01-31 21:19:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:11,772 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-01-31 21:19:11,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-01-31 21:19:11,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:11,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:11,773 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:11,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2022-01-31 21:19:11,773 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1853222356, now seen corresponding path program 173 times [2022-01-31 21:19:11,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:11,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140541679] [2022-01-31 21:19:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:11,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:11,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:11,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:11,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:11,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:11,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:11,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140541679] [2022-01-31 21:19:11,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [140541679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:11,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:11,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:11,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304622887] [2022-01-31 21:19:11,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:11,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:11,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:11,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:11,983 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:12,372 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-01-31 21:19:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:12,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:12,372 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:19:12,372 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:19:12,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:12,373 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:12,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:12,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:19:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 131. [2022-01-31 21:19:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-01-31 21:19:12,468 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 50 [2022-01-31 21:19:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:12,468 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-01-31 21:19:12,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-01-31 21:19:12,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:12,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:12,469 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:12,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2022-01-31 21:19:12,469 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:12,469 INFO L85 PathProgramCache]: Analyzing trace with hash 565351764, now seen corresponding path program 174 times [2022-01-31 21:19:12,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:12,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077295391] [2022-01-31 21:19:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:12,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:12,470 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:12,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:12,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:12,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:12,594 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:12,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077295391] [2022-01-31 21:19:12,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077295391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:12,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:12,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:12,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896437289] [2022-01-31 21:19:12,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:12,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:12,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:12,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:12,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:12,595 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:12,960 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-01-31 21:19:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:12,961 INFO L225 Difference]: With dead ends: 152 [2022-01-31 21:19:12,961 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:19:12,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:12,961 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:12,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:19:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2022-01-31 21:19:13,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-01-31 21:19:13,063 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 50 [2022-01-31 21:19:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:13,063 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-01-31 21:19:13,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-01-31 21:19:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:13,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:13,063 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:13,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2022-01-31 21:19:13,063 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:13,064 INFO L85 PathProgramCache]: Analyzing trace with hash -127705900, now seen corresponding path program 175 times [2022-01-31 21:19:13,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:13,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226033511] [2022-01-31 21:19:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:13,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:13,065 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:13,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:13,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:13,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:13,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:13,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226033511] [2022-01-31 21:19:13,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [226033511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:13,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:13,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:13,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814179327] [2022-01-31 21:19:13,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:13,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:13,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:13,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:13,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:13,197 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:13,564 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-01-31 21:19:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:13,565 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:13,565 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:19:13,565 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:19:13,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:13,566 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:13,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 21 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:19:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2022-01-31 21:19:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-01-31 21:19:13,686 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 50 [2022-01-31 21:19:13,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:13,686 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-01-31 21:19:13,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-01-31 21:19:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:13,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:13,686 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:13,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-01-31 21:19:13,687 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash -436190124, now seen corresponding path program 176 times [2022-01-31 21:19:13,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:13,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883200702] [2022-01-31 21:19:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:13,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:13,688 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:13,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:13,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:13,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:13,896 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:13,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883200702] [2022-01-31 21:19:13,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [883200702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:13,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:13,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:13,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563688568] [2022-01-31 21:19:13,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:13,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:13,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:13,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:13,897 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:14,367 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:19:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:14,367 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:14,367 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:19:14,367 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:19:14,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:14,368 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:14,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 23 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:19:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2022-01-31 21:19:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-01-31 21:19:14,465 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 50 [2022-01-31 21:19:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:14,465 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-01-31 21:19:14,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-01-31 21:19:14,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:14,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:14,465 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:14,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-01-31 21:19:14,465 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash -536785964, now seen corresponding path program 177 times [2022-01-31 21:19:14,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:14,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612241202] [2022-01-31 21:19:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:14,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:14,470 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:14,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:14,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:14,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:14,627 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:14,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612241202] [2022-01-31 21:19:14,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1612241202] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:14,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:14,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:14,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684593212] [2022-01-31 21:19:14,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:14,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:14,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:14,627 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:15,174 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:19:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:15,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:15,174 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:19:15,175 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:19:15,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:15,175 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:15,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:19:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 139. [2022-01-31 21:19:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-01-31 21:19:15,273 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 50 [2022-01-31 21:19:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:15,273 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-01-31 21:19:15,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-01-31 21:19:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:15,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:15,274 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:15,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2022-01-31 21:19:15,274 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1574859604, now seen corresponding path program 178 times [2022-01-31 21:19:15,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:15,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131479626] [2022-01-31 21:19:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:15,275 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:15,275 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:15,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:15,276 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:15,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:15,487 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 21:19:15,487 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:15,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131479626] [2022-01-31 21:19:15,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [131479626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:15,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:15,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:15,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269398242] [2022-01-31 21:19:15,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:15,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:15,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:15,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:15,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:15,488 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:15,963 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:19:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:15,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:15,964 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:19:15,964 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:19:15,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:15,964 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:15,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:19:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 141. [2022-01-31 21:19:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-01-31 21:19:16,066 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 50 [2022-01-31 21:19:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:16,066 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-01-31 21:19:16,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-01-31 21:19:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:16,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:16,067 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:16,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2022-01-31 21:19:16,067 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:16,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:16,067 INFO L85 PathProgramCache]: Analyzing trace with hash -653280556, now seen corresponding path program 179 times [2022-01-31 21:19:16,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:16,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943152260] [2022-01-31 21:19:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:16,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:16,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:16,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:16,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:16,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:16,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943152260] [2022-01-31 21:19:16,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1943152260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:16,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:16,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:16,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576168649] [2022-01-31 21:19:16,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:16,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:16,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:16,281 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:16,695 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:19:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:16,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:16,696 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:19:16,696 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:19:16,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:16,696 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:16,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 21 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:19:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2022-01-31 21:19:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-01-31 21:19:16,808 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 50 [2022-01-31 21:19:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:16,808 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-01-31 21:19:16,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-01-31 21:19:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:16,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:16,809 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:16,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2022-01-31 21:19:16,809 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:16,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1292706388, now seen corresponding path program 180 times [2022-01-31 21:19:16,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:16,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562350318] [2022-01-31 21:19:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:16,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:16,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:16,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:16,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:17,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:17,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562350318] [2022-01-31 21:19:17,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [562350318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:17,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:17,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:17,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084287201] [2022-01-31 21:19:17,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:17,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:17,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:17,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:17,024 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:17,560 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:19:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:17,560 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:17,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:17,561 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:19:17,561 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:19:17,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:17,561 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:17,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 23 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:19:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2022-01-31 21:19:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-01-31 21:19:17,674 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 50 [2022-01-31 21:19:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:17,674 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-01-31 21:19:17,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-01-31 21:19:17,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:17,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:17,674 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:17,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2022-01-31 21:19:17,674 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:17,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1219581484, now seen corresponding path program 181 times [2022-01-31 21:19:17,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:17,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004224967] [2022-01-31 21:19:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:17,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:17,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:17,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:17,676 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:17,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:17,882 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 21:19:17,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:17,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004224967] [2022-01-31 21:19:17,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004224967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:17,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:17,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:17,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764916219] [2022-01-31 21:19:17,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:17,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:17,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:17,883 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:18,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:18,438 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:19:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:18,438 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:18,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:18,438 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:19:18,438 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:19:18,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:18,439 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:18,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 21 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:19:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2022-01-31 21:19:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-01-31 21:19:18,548 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 50 [2022-01-31 21:19:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:18,548 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-01-31 21:19:18,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-01-31 21:19:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:18,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:18,549 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:18,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2022-01-31 21:19:18,549 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:18,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1756606124, now seen corresponding path program 182 times [2022-01-31 21:19:18,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:18,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881521487] [2022-01-31 21:19:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:18,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:18,550 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:18,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:18,551 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:18,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:18,759 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881521487] [2022-01-31 21:19:18,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881521487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:18,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:18,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:18,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551411142] [2022-01-31 21:19:18,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:18,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:18,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:18,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:18,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:18,760 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:19,321 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:19:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:19,321 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:19,322 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:19:19,322 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:19:19,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:19,322 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:19,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 15 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:19:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 149. [2022-01-31 21:19:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-01-31 21:19:19,438 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 50 [2022-01-31 21:19:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:19,438 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-01-31 21:19:19,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-01-31 21:19:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:19,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:19,439 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:19,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2022-01-31 21:19:19,439 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1853757652, now seen corresponding path program 183 times [2022-01-31 21:19:19,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:19,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535471736] [2022-01-31 21:19:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:19,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:19,440 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:19,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:19,441 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:19,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:19,646 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535471736] [2022-01-31 21:19:19,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1535471736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:19,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:19,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:19,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734436712] [2022-01-31 21:19:19,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:19,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:19,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:19,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:19,647 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:20,221 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:19:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:20,222 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:19:20,222 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:19:20,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:20,223 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:20,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:19:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 151. [2022-01-31 21:19:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-01-31 21:19:20,338 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 50 [2022-01-31 21:19:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:20,338 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-01-31 21:19:20,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:20,338 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-01-31 21:19:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:20,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:20,339 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:20,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2022-01-31 21:19:20,339 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:20,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1079771220, now seen corresponding path program 184 times [2022-01-31 21:19:20,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:20,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969289289] [2022-01-31 21:19:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:20,340 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:20,340 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:20,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:20,341 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:20,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:20,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969289289] [2022-01-31 21:19:20,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1969289289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:20,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:20,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:20,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191470340] [2022-01-31 21:19:20,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:20,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:20,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:20,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:20,549 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:21,160 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:19:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:21,161 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:19:21,161 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:19:21,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:21,162 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:21,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:21,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:19:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 153. [2022-01-31 21:19:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-01-31 21:19:21,288 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 50 [2022-01-31 21:19:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:21,289 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-01-31 21:19:21,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:21,289 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-01-31 21:19:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:21,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:21,289 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:21,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2022-01-31 21:19:21,289 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:21,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:21,289 INFO L85 PathProgramCache]: Analyzing trace with hash 308152276, now seen corresponding path program 185 times [2022-01-31 21:19:21,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:21,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129243165] [2022-01-31 21:19:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:21,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:21,290 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:21,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:21,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:21,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:21,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:21,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129243165] [2022-01-31 21:19:21,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [129243165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:21,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:21,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:21,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281474039] [2022-01-31 21:19:21,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:21,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:21,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:21,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:21,501 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:22,083 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:19:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:22,083 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:22,084 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:19:22,084 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:19:22,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:22,084 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:22,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:19:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 155. [2022-01-31 21:19:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-01-31 21:19:22,210 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 50 [2022-01-31 21:19:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:22,210 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-01-31 21:19:22,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:22,211 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-01-31 21:19:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:22,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:22,211 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:22,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2022-01-31 21:19:22,211 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:22,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1811689300, now seen corresponding path program 186 times [2022-01-31 21:19:22,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:22,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277484428] [2022-01-31 21:19:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:22,212 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:22,212 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:22,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:22,213 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:22,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:22,422 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:22,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277484428] [2022-01-31 21:19:22,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1277484428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:22,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:22,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:22,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684829991] [2022-01-31 21:19:22,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:22,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:22,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:22,423 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:23,001 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:19:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:23,001 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:23,002 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:19:23,002 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:19:23,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:23,002 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:23,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:19:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 157. [2022-01-31 21:19:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-01-31 21:19:23,134 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 50 [2022-01-31 21:19:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:23,134 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-01-31 21:19:23,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-01-31 21:19:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:23,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:23,134 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:23,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2022-01-31 21:19:23,135 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:23,135 INFO L85 PathProgramCache]: Analyzing trace with hash -693209388, now seen corresponding path program 187 times [2022-01-31 21:19:23,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:23,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603625705] [2022-01-31 21:19:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:23,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:23,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:23,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:23,136 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:23,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:23,343 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:23,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603625705] [2022-01-31 21:19:23,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603625705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:23,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:23,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:23,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403844463] [2022-01-31 21:19:23,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:23,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:23,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:23,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:23,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:23,344 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:23,870 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:19:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:23,871 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:19:23,871 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:19:23,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:23,871 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:23,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:19:23,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 159. [2022-01-31 21:19:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-01-31 21:19:23,995 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 50 [2022-01-31 21:19:23,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:23,995 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-01-31 21:19:23,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-01-31 21:19:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:23,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:23,996 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:23,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2022-01-31 21:19:23,996 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:23,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:23,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1575804500, now seen corresponding path program 188 times [2022-01-31 21:19:23,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:23,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988751590] [2022-01-31 21:19:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:23,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:23,997 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:23,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:24,000 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:24,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:24,221 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:24,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988751590] [2022-01-31 21:19:24,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988751590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:24,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:24,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:24,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395086724] [2022-01-31 21:19:24,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:24,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:24,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:24,222 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:24,799 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:19:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:24,800 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:24,800 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:19:24,800 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:19:24,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:24,801 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:24,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:19:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 161. [2022-01-31 21:19:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-01-31 21:19:24,928 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 50 [2022-01-31 21:19:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:24,928 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-01-31 21:19:24,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-01-31 21:19:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:19:24,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:24,928 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:24,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2022-01-31 21:19:24,930 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:24,931 INFO L85 PathProgramCache]: Analyzing trace with hash 254764500, now seen corresponding path program 189 times [2022-01-31 21:19:24,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:24,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221837017] [2022-01-31 21:19:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:24,933 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:24,933 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:24,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:24,935 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:25,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:25,147 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:25,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221837017] [2022-01-31 21:19:25,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [221837017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:25,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:25,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:19:25,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667544740] [2022-01-31 21:19:25,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:25,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:19:25,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:19:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:19:25,148 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:25,707 INFO L93 Difference]: Finished difference Result 204 states and 296 transitions. [2022-01-31 21:19:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:19:25,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:19:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:25,707 INFO L225 Difference]: With dead ends: 204 [2022-01-31 21:19:25,708 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 21:19:25,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:19:25,708 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:25,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 21:19:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 127. [2022-01-31 21:19:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-01-31 21:19:25,797 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 50 [2022-01-31 21:19:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:25,797 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-01-31 21:19:25,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:25,797 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-01-31 21:19:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:25,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:25,797 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:25,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-01-31 21:19:25,797 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1540922167, now seen corresponding path program 190 times [2022-01-31 21:19:25,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:25,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736083999] [2022-01-31 21:19:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:25,799 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:25,799 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:25,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:25,799 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:26,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:26,026 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 21:19:26,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:26,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736083999] [2022-01-31 21:19:26,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736083999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:26,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:26,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:26,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38000962] [2022-01-31 21:19:26,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:26,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:26,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:26,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:26,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:26,027 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:26,546 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2022-01-31 21:19:26,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:26,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:26,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:26,546 INFO L225 Difference]: With dead ends: 142 [2022-01-31 21:19:26,546 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 21:19:26,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:26,547 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:26,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 21 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 21:19:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2022-01-31 21:19:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-01-31 21:19:26,638 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 52 [2022-01-31 21:19:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:26,638 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-01-31 21:19:26,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-01-31 21:19:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:26,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:26,639 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:26,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-01-31 21:19:26,639 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:26,639 INFO L85 PathProgramCache]: Analyzing trace with hash 445973175, now seen corresponding path program 191 times [2022-01-31 21:19:26,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:26,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108225467] [2022-01-31 21:19:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:26,640 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:26,640 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:26,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:26,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:26,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:26,789 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108225467] [2022-01-31 21:19:26,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1108225467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:26,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:26,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:26,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871883626] [2022-01-31 21:19:26,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:26,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:26,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:26,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:26,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:26,790 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:27,181 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-01-31 21:19:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:27,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:27,181 INFO L225 Difference]: With dead ends: 146 [2022-01-31 21:19:27,181 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:19:27,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:27,182 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:27,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:19:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-01-31 21:19:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-01-31 21:19:27,282 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 52 [2022-01-31 21:19:27,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:27,282 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-01-31 21:19:27,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-01-31 21:19:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:27,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:27,283 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:27,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2022-01-31 21:19:27,283 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:27,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:27,283 INFO L85 PathProgramCache]: Analyzing trace with hash 466979383, now seen corresponding path program 192 times [2022-01-31 21:19:27,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:27,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561978889] [2022-01-31 21:19:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:27,284 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:27,284 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:27,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:27,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:27,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:27,511 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561978889] [2022-01-31 21:19:27,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561978889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:27,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:27,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:27,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104981219] [2022-01-31 21:19:27,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:27,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:27,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:27,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:27,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:27,512 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:28,013 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-01-31 21:19:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:28,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:28,014 INFO L225 Difference]: With dead ends: 152 [2022-01-31 21:19:28,014 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:19:28,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:28,015 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:28,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:19:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2022-01-31 21:19:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-01-31 21:19:28,121 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 52 [2022-01-31 21:19:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:28,121 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-01-31 21:19:28,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-01-31 21:19:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:28,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:28,121 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:28,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2022-01-31 21:19:28,121 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:28,122 INFO L85 PathProgramCache]: Analyzing trace with hash -820891209, now seen corresponding path program 193 times [2022-01-31 21:19:28,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:28,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124489293] [2022-01-31 21:19:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:28,123 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:28,123 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:28,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:28,123 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:28,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:28,256 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:28,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124489293] [2022-01-31 21:19:28,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2124489293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:28,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:28,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:28,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352054050] [2022-01-31 21:19:28,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:28,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:28,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:28,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:28,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:28,257 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:28,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:28,659 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-01-31 21:19:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:28,659 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:28,659 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:19:28,660 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:19:28,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:28,660 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:28,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 17 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:19:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2022-01-31 21:19:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-01-31 21:19:28,766 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 52 [2022-01-31 21:19:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:28,766 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-01-31 21:19:28,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-01-31 21:19:28,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:28,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:28,766 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:28,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2022-01-31 21:19:28,766 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:28,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1513948873, now seen corresponding path program 194 times [2022-01-31 21:19:28,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:28,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776855076] [2022-01-31 21:19:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:28,768 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:28,768 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:28,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:28,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:28,923 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776855076] [2022-01-31 21:19:28,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [776855076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:28,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:28,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:28,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512948836] [2022-01-31 21:19:28,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:28,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:28,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:28,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:28,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:28,924 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:29,446 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:19:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:29,446 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:29,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:29,446 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:19:29,447 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:19:29,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:29,448 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:29,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:19:29,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 141. [2022-01-31 21:19:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-01-31 21:19:29,559 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 52 [2022-01-31 21:19:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:29,559 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-01-31 21:19:29,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-01-31 21:19:29,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:29,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:29,560 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:29,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2022-01-31 21:19:29,560 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1822433097, now seen corresponding path program 195 times [2022-01-31 21:19:29,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:29,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662117749] [2022-01-31 21:19:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:29,561 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:29,561 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:29,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:29,562 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:29,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:29,699 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:29,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662117749] [2022-01-31 21:19:29,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662117749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:29,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:29,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:29,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082191451] [2022-01-31 21:19:29,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:29,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:29,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:29,700 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:30,128 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:19:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:30,128 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:30,129 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:19:30,129 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:19:30,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:30,129 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:30,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:19:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 143. [2022-01-31 21:19:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-01-31 21:19:30,246 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 52 [2022-01-31 21:19:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:30,247 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-01-31 21:19:30,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-01-31 21:19:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:30,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:30,247 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:30,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2022-01-31 21:19:30,247 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:30,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1923028937, now seen corresponding path program 196 times [2022-01-31 21:19:30,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:30,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483636736] [2022-01-31 21:19:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:30,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:30,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:30,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:30,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:30,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:30,476 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:30,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483636736] [2022-01-31 21:19:30,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [483636736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:30,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:30,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:30,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114593091] [2022-01-31 21:19:30,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:30,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:30,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:30,477 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:30,973 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:19:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:30,973 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:19:30,973 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:19:30,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:30,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:30,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:19:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 145. [2022-01-31 21:19:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-01-31 21:19:31,092 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 52 [2022-01-31 21:19:31,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:31,092 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-01-31 21:19:31,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-01-31 21:19:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:31,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:31,092 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:31,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-01-31 21:19:31,093 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:31,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:31,093 INFO L85 PathProgramCache]: Analyzing trace with hash 188616631, now seen corresponding path program 197 times [2022-01-31 21:19:31,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:31,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964253226] [2022-01-31 21:19:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:31,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:31,094 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:31,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:31,095 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:31,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:31,317 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 21:19:31,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:31,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964253226] [2022-01-31 21:19:31,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964253226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:31,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:31,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:31,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584827727] [2022-01-31 21:19:31,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:31,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:31,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:31,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:31,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:31,318 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:31,849 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:19:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:31,850 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:31,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:31,850 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:19:31,850 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:19:31,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:31,851 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:31,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:19:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2022-01-31 21:19:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-01-31 21:19:31,970 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 52 [2022-01-31 21:19:31,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:31,970 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-01-31 21:19:31,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-01-31 21:19:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:31,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:31,971 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:31,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-01-31 21:19:31,971 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:31,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2039523529, now seen corresponding path program 198 times [2022-01-31 21:19:31,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:31,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382584607] [2022-01-31 21:19:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:31,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:31,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:31,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:31,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:32,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:32,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:32,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382584607] [2022-01-31 21:19:32,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [382584607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:32,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:32,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:32,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054033065] [2022-01-31 21:19:32,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:32,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:32,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:32,212 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:32,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:32,786 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:19:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:32,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:32,787 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:19:32,787 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:19:32,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:32,787 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:32,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:19:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 149. [2022-01-31 21:19:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-01-31 21:19:32,907 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 52 [2022-01-31 21:19:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:32,907 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-01-31 21:19:32,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-01-31 21:19:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:32,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:32,908 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:32,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-01-31 21:19:32,908 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash -93536585, now seen corresponding path program 199 times [2022-01-31 21:19:32,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:32,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198914349] [2022-01-31 21:19:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:32,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:32,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:32,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:32,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:33,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:33,112 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198914349] [2022-01-31 21:19:33,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1198914349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:33,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:33,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:33,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474907306] [2022-01-31 21:19:33,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:33,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:33,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:33,113 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:33,702 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:19:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:33,702 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:33,703 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:19:33,703 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:19:33,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:33,703 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:33,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:19:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 151. [2022-01-31 21:19:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-01-31 21:19:33,827 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 52 [2022-01-31 21:19:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:33,827 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-01-31 21:19:33,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-01-31 21:19:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:33,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:33,830 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:33,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2022-01-31 21:19:33,830 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1689142839, now seen corresponding path program 200 times [2022-01-31 21:19:33,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:33,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458415281] [2022-01-31 21:19:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:33,831 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:33,831 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:33,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:33,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:34,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:34,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:34,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458415281] [2022-01-31 21:19:34,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [458415281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:34,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:34,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:34,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811639856] [2022-01-31 21:19:34,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:34,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:34,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:34,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:34,056 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:34,646 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:19:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:34,646 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:34,646 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:19:34,646 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:19:34,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:34,647 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:34,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 15 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:19:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 153. [2022-01-31 21:19:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-01-31 21:19:34,776 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 52 [2022-01-31 21:19:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:34,776 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-01-31 21:19:34,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-01-31 21:19:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:34,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:34,776 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:34,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2022-01-31 21:19:34,776 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:34,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1152118199, now seen corresponding path program 201 times [2022-01-31 21:19:34,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:34,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549843270] [2022-01-31 21:19:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:34,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:34,778 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:34,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:34,778 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:34,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:35,000 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:35,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549843270] [2022-01-31 21:19:35,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [549843270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:35,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:35,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:35,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938653181] [2022-01-31 21:19:35,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:35,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:35,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:35,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:35,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:35,001 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:35,606 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:19:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:35,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:35,607 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:19:35,607 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:19:35,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:35,607 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:35,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:19:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 155. [2022-01-31 21:19:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-01-31 21:19:35,738 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 52 [2022-01-31 21:19:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:35,738 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-01-31 21:19:35,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-01-31 21:19:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:35,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:35,739 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:35,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2022-01-31 21:19:35,739 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:35,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash 467514679, now seen corresponding path program 202 times [2022-01-31 21:19:35,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:35,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336178291] [2022-01-31 21:19:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:35,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:35,740 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:35,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:35,740 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:35,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:35,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:35,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336178291] [2022-01-31 21:19:35,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336178291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:35,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:35,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:35,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329557514] [2022-01-31 21:19:35,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:35,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:35,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:35,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:35,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:35,972 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:36,664 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:19:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:36,665 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:36,665 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:19:36,665 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:19:36,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:36,666 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:36,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:19:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 157. [2022-01-31 21:19:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-01-31 21:19:36,798 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 52 [2022-01-31 21:19:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:36,798 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-01-31 21:19:36,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-01-31 21:19:36,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:36,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:36,799 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:36,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2022-01-31 21:19:36,799 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:36,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:36,799 INFO L85 PathProgramCache]: Analyzing trace with hash -306471753, now seen corresponding path program 203 times [2022-01-31 21:19:36,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:36,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190691324] [2022-01-31 21:19:36,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:36,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:36,800 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:36,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:36,801 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:37,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:37,026 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 21:19:37,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:37,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190691324] [2022-01-31 21:19:37,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190691324] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:37,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:37,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:37,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387029281] [2022-01-31 21:19:37,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:37,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:37,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:37,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:37,028 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:37,656 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:19:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:37,657 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:19:37,657 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:19:37,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:37,657 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:37,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 25 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:19:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 159. [2022-01-31 21:19:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-01-31 21:19:37,793 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 52 [2022-01-31 21:19:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:37,793 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-01-31 21:19:37,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-01-31 21:19:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:37,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:37,793 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:37,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2022-01-31 21:19:37,794 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:37,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1078090697, now seen corresponding path program 204 times [2022-01-31 21:19:37,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:37,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439802589] [2022-01-31 21:19:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:37,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:37,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:37,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:37,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:38,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:38,020 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:38,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439802589] [2022-01-31 21:19:38,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1439802589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:38,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:38,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:38,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612046670] [2022-01-31 21:19:38,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:38,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:38,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:38,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:38,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:38,021 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:38,659 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:19:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:38,659 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:19:38,659 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:19:38,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:38,660 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:38,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:19:38,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 161. [2022-01-31 21:19:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-01-31 21:19:38,799 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 52 [2022-01-31 21:19:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:38,800 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-01-31 21:19:38,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:38,800 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-01-31 21:19:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:38,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:38,800 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:38,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2022-01-31 21:19:38,800 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash 425446327, now seen corresponding path program 205 times [2022-01-31 21:19:38,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:38,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147461260] [2022-01-31 21:19:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:38,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:38,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:38,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:38,802 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:39,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:39,027 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 21:19:39,028 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:39,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147461260] [2022-01-31 21:19:39,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147461260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:39,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:39,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:39,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459404106] [2022-01-31 21:19:39,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:39,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:39,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:39,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:39,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:39,029 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:39,522 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:19:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:39,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:39,522 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:19:39,523 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:19:39,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:39,523 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:39,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:39,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:19:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 163. [2022-01-31 21:19:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-01-31 21:19:39,661 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 52 [2022-01-31 21:19:39,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:39,661 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-01-31 21:19:39,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:39,661 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-01-31 21:19:39,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:39,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:39,662 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:39,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2022-01-31 21:19:39,662 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2079452361, now seen corresponding path program 206 times [2022-01-31 21:19:39,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:39,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060181911] [2022-01-31 21:19:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:39,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:39,663 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:39,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:39,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:39,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:39,804 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:39,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060181911] [2022-01-31 21:19:39,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1060181911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:39,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:39,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:39,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293528740] [2022-01-31 21:19:39,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:39,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:39,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:39,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:39,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:39,805 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:40,322 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:19:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:40,322 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:40,323 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:19:40,323 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:19:40,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:40,323 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:40,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:19:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 165. [2022-01-31 21:19:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-01-31 21:19:40,467 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 52 [2022-01-31 21:19:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:40,467 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-01-31 21:19:40,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-01-31 21:19:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:40,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:40,467 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:40,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2022-01-31 21:19:40,467 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash 189561527, now seen corresponding path program 207 times [2022-01-31 21:19:40,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:40,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967399955] [2022-01-31 21:19:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:40,468 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:40,469 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:40,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:40,469 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:40,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:40,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:40,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967399955] [2022-01-31 21:19:40,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1967399955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:40,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:40,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:40,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682989603] [2022-01-31 21:19:40,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:40,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:40,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:40,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:40,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:40,608 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:41,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:41,160 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:19:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:41,163 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:19:41,163 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:19:41,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:41,163 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:41,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:19:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 167. [2022-01-31 21:19:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-01-31 21:19:41,310 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 52 [2022-01-31 21:19:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:41,310 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-01-31 21:19:41,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-01-31 21:19:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:41,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:41,310 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:41,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2022-01-31 21:19:41,310 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1131478473, now seen corresponding path program 208 times [2022-01-31 21:19:41,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:41,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481908435] [2022-01-31 21:19:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:41,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:41,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:41,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:41,312 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:41,590 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:41,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481908435] [2022-01-31 21:19:41,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1481908435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:41,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:41,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:41,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650880465] [2022-01-31 21:19:41,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:41,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:41,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:41,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:41,591 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:42,212 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:19:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:42,212 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:42,212 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:19:42,213 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:19:42,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:42,213 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:42,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:19:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 169. [2022-01-31 21:19:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-01-31 21:19:42,358 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 52 [2022-01-31 21:19:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:42,358 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-01-31 21:19:42,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-01-31 21:19:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:19:42,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:42,358 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:42,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2022-01-31 21:19:42,358 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:42,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:42,359 INFO L85 PathProgramCache]: Analyzing trace with hash 659401143, now seen corresponding path program 209 times [2022-01-31 21:19:42,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:42,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222598578] [2022-01-31 21:19:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:42,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:42,360 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:42,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:42,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:42,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:42,584 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:42,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222598578] [2022-01-31 21:19:42,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [222598578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:42,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:42,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:19:42,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544931394] [2022-01-31 21:19:42,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:42,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:19:42,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:42,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:19:42,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:19:42,585 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:43,104 INFO L93 Difference]: Finished difference Result 214 states and 311 transitions. [2022-01-31 21:19:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:19:43,104 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:19:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:43,105 INFO L225 Difference]: With dead ends: 214 [2022-01-31 21:19:43,105 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 21:19:43,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:19:43,105 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:43,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 21:19:43,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 133. [2022-01-31 21:19:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-01-31 21:19:43,206 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 52 [2022-01-31 21:19:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:43,206 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-01-31 21:19:43,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-01-31 21:19:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:43,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:43,207 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:43,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2022-01-31 21:19:43,207 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash 801286874, now seen corresponding path program 210 times [2022-01-31 21:19:43,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:43,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884770448] [2022-01-31 21:19:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:43,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:43,208 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:43,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:43,209 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:43,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:43,403 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:43,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884770448] [2022-01-31 21:19:43,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [884770448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:43,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:43,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:43,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100755296] [2022-01-31 21:19:43,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:43,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:43,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:43,404 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:43,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:43,935 INFO L93 Difference]: Finished difference Result 148 states and 213 transitions. [2022-01-31 21:19:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:43,935 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:43,936 INFO L225 Difference]: With dead ends: 148 [2022-01-31 21:19:43,936 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 21:19:43,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:43,936 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:43,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 23 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 21:19:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 137. [2022-01-31 21:19:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-01-31 21:19:44,041 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 54 [2022-01-31 21:19:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:44,041 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-01-31 21:19:44,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-01-31 21:19:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:44,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:44,041 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:44,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2022-01-31 21:19:44,042 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:44,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:44,042 INFO L85 PathProgramCache]: Analyzing trace with hash -293662118, now seen corresponding path program 211 times [2022-01-31 21:19:44,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:44,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147603915] [2022-01-31 21:19:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:44,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:44,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:44,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:44,043 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:44,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:44,282 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:44,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147603915] [2022-01-31 21:19:44,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [147603915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:44,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:44,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:44,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506168504] [2022-01-31 21:19:44,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:44,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:44,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:44,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:44,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:44,283 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:44,867 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-01-31 21:19:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:44,868 INFO L225 Difference]: With dead ends: 152 [2022-01-31 21:19:44,868 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 21:19:44,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:44,868 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:44,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 19 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 21:19:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2022-01-31 21:19:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-01-31 21:19:44,985 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 54 [2022-01-31 21:19:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:44,985 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-01-31 21:19:44,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-01-31 21:19:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:44,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:44,986 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:44,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2022-01-31 21:19:44,986 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash -272655910, now seen corresponding path program 212 times [2022-01-31 21:19:44,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:44,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336174488] [2022-01-31 21:19:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:44,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:44,987 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:44,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:44,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:45,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:45,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:45,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336174488] [2022-01-31 21:19:45,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [336174488] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:45,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:45,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:45,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235148461] [2022-01-31 21:19:45,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:45,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:45,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:45,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:45,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:45,245 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:45,673 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-01-31 21:19:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:45,674 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:45,674 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:19:45,674 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:19:45,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:45,675 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:45,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:19:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2022-01-31 21:19:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-01-31 21:19:45,806 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 54 [2022-01-31 21:19:45,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:45,807 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-01-31 21:19:45,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:45,807 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-01-31 21:19:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:45,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:45,807 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:45,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2022-01-31 21:19:45,807 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1560526502, now seen corresponding path program 213 times [2022-01-31 21:19:45,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:45,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434858114] [2022-01-31 21:19:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:45,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:45,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:45,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:45,809 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:45,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:45,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:45,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434858114] [2022-01-31 21:19:45,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [434858114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:45,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:45,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:45,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816208378] [2022-01-31 21:19:45,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:45,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:45,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:45,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:45,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:45,953 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:46,472 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:19:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:46,473 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:46,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:46,473 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:19:46,473 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:19:46,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:46,474 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:46,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:46,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:19:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 145. [2022-01-31 21:19:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-01-31 21:19:46,595 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 54 [2022-01-31 21:19:46,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:46,595 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-01-31 21:19:46,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-01-31 21:19:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:46,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:46,595 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:46,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2022-01-31 21:19:46,596 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:46,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:46,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2041383130, now seen corresponding path program 214 times [2022-01-31 21:19:46,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:46,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148414106] [2022-01-31 21:19:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:46,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:46,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:46,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:46,597 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:46,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:46,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:46,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148414106] [2022-01-31 21:19:46,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [148414106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:46,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:46,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:46,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237847534] [2022-01-31 21:19:46,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:46,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:46,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:46,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:46,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:46,834 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:47,423 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:19:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:47,424 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:47,424 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:19:47,424 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:19:47,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:47,425 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:47,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:47,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:19:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2022-01-31 21:19:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-01-31 21:19:47,547 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 54 [2022-01-31 21:19:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:47,547 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-01-31 21:19:47,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-01-31 21:19:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:47,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:47,547 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:47,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2022-01-31 21:19:47,548 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898906, now seen corresponding path program 215 times [2022-01-31 21:19:47,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:47,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114874165] [2022-01-31 21:19:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:47,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:47,549 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:47,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:47,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:47,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:47,776 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:47,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114874165] [2022-01-31 21:19:47,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114874165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:47,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:47,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:47,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494307507] [2022-01-31 21:19:47,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:47,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:47,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:47,777 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:48,300 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:19:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:48,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:48,301 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:19:48,301 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:19:48,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:48,301 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:48,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:19:48,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 149. [2022-01-31 21:19:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-01-31 21:19:48,428 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 54 [2022-01-31 21:19:48,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:48,428 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-01-31 21:19:48,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:48,428 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-01-31 21:19:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:48,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:48,428 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:48,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2022-01-31 21:19:48,428 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:48,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:48,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1632303066, now seen corresponding path program 216 times [2022-01-31 21:19:48,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:48,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624256457] [2022-01-31 21:19:48,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:48,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:48,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:48,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:48,430 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:48,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:48,632 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 21:19:48,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:48,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624256457] [2022-01-31 21:19:48,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1624256457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:48,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:48,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:48,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245949109] [2022-01-31 21:19:48,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:48,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:48,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:48,633 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:49,203 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:19:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:49,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:49,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:49,204 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:19:49,204 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:19:49,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:49,204 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:49,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:49,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:19:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2022-01-31 21:19:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-01-31 21:19:49,332 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 54 [2022-01-31 21:19:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:49,332 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-01-31 21:19:49,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-01-31 21:19:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:49,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:49,333 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:49,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2022-01-31 21:19:49,333 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash -551018662, now seen corresponding path program 217 times [2022-01-31 21:19:49,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:49,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881561750] [2022-01-31 21:19:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:49,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:49,334 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:49,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:49,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:49,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:49,530 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:49,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881561750] [2022-01-31 21:19:49,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [881561750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:49,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:49,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:49,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789297007] [2022-01-31 21:19:49,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:49,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:49,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:49,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:49,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:49,531 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:50,112 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:19:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:50,112 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:50,112 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:19:50,112 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:19:50,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:50,113 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:50,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:19:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2022-01-31 21:19:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-01-31 21:19:50,251 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 54 [2022-01-31 21:19:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:50,251 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-01-31 21:19:50,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-01-31 21:19:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:50,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:50,251 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:50,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2022-01-31 21:19:50,251 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1515808474, now seen corresponding path program 218 times [2022-01-31 21:19:50,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100549739] [2022-01-31 21:19:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:50,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:50,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:50,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:50,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:50,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:50,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:50,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100549739] [2022-01-31 21:19:50,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100549739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:50,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:50,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:50,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015267223] [2022-01-31 21:19:50,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:50,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:50,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:50,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:50,494 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:51,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:51,090 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:19:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:51,091 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:51,115 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:19:51,115 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:19:51,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:51,116 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:51,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:19:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 155. [2022-01-31 21:19:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-01-31 21:19:51,271 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 54 [2022-01-31 21:19:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:51,271 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-01-31 21:19:51,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-01-31 21:19:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:51,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:51,272 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:51,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2022-01-31 21:19:51,272 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash -833171878, now seen corresponding path program 219 times [2022-01-31 21:19:51,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156960467] [2022-01-31 21:19:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:51,273 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:51,273 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:51,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:51,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:51,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:51,572 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:51,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156960467] [2022-01-31 21:19:51,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [156960467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:51,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:51,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:51,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480386955] [2022-01-31 21:19:51,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:51,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:51,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:51,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:51,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:51,573 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:52,133 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:19:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:52,133 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:52,134 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:19:52,134 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:19:52,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:52,134 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:52,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:19:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 157. [2022-01-31 21:19:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-01-31 21:19:52,280 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 54 [2022-01-31 21:19:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:52,280 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-01-31 21:19:52,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-01-31 21:19:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:52,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:52,281 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:52,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2022-01-31 21:19:52,281 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:52,281 INFO L85 PathProgramCache]: Analyzing trace with hash 949507546, now seen corresponding path program 220 times [2022-01-31 21:19:52,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:52,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797080562] [2022-01-31 21:19:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:52,282 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:52,282 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:52,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:52,283 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:52,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:52,517 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 21:19:52,517 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:52,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797080562] [2022-01-31 21:19:52,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1797080562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:52,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:52,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:52,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966756059] [2022-01-31 21:19:52,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:52,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:52,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:52,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:52,518 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:53,047 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:19:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:53,048 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:19:53,048 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:19:53,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:53,048 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:53,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:19:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2022-01-31 21:19:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-01-31 21:19:53,200 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 54 [2022-01-31 21:19:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:53,200 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-01-31 21:19:53,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-01-31 21:19:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:53,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:53,201 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:53,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2022-01-31 21:19:53,201 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:53,201 INFO L85 PathProgramCache]: Analyzing trace with hash 412482906, now seen corresponding path program 221 times [2022-01-31 21:19:53,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:53,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896819920] [2022-01-31 21:19:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:53,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:53,202 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:53,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:53,203 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:53,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:53,364 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 21:19:53,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:53,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896819920] [2022-01-31 21:19:53,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [896819920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:53,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:53,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:53,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401921829] [2022-01-31 21:19:53,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:53,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:53,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:53,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:53,365 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:53,881 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:19:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:53,881 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:53,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:53,882 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:19:53,882 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:19:53,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:53,882 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:53,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:19:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 161. [2022-01-31 21:19:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-01-31 21:19:54,029 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 54 [2022-01-31 21:19:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:54,029 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-01-31 21:19:54,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-01-31 21:19:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:54,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:54,030 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:54,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2022-01-31 21:19:54,030 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:54,030 INFO L85 PathProgramCache]: Analyzing trace with hash -272120614, now seen corresponding path program 222 times [2022-01-31 21:19:54,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:54,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655971798] [2022-01-31 21:19:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:54,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:54,032 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:54,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:54,032 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:54,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:54,178 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:54,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655971798] [2022-01-31 21:19:54,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [655971798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:54,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:54,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:54,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908844373] [2022-01-31 21:19:54,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:54,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:54,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:54,179 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:54,709 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:19:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:54,709 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:54,710 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:19:54,710 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:19:54,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:54,710 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:54,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:19:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 163. [2022-01-31 21:19:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-01-31 21:19:54,858 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 54 [2022-01-31 21:19:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:54,858 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-01-31 21:19:54,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-01-31 21:19:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:54,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:54,858 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:54,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2022-01-31 21:19:54,859 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:54,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1046107046, now seen corresponding path program 223 times [2022-01-31 21:19:54,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:54,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720311826] [2022-01-31 21:19:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:54,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:54,860 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:54,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:54,860 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:55,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:55,003 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:55,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720311826] [2022-01-31 21:19:55,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [720311826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:55,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:55,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:55,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087418236] [2022-01-31 21:19:55,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:55,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:55,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:55,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:55,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:55,004 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:55,584 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:19:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:55,584 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:55,584 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:19:55,584 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:19:55,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:55,585 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:55,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:19:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 165. [2022-01-31 21:19:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-01-31 21:19:55,742 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 54 [2022-01-31 21:19:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:55,743 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-01-31 21:19:55,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-01-31 21:19:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:55,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:55,743 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:55,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2022-01-31 21:19:55,743 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:55,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:55,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1817725990, now seen corresponding path program 224 times [2022-01-31 21:19:55,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:55,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133128488] [2022-01-31 21:19:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:55,744 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:55,744 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:55,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:55,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:55,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:55,942 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 21:19:55,942 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:55,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133128488] [2022-01-31 21:19:55,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133128488] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:55,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:55,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:55,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122149471] [2022-01-31 21:19:55,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:55,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:55,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:55,943 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:56,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:56,573 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:19:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:56,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:56,574 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:19:56,574 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:19:56,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:56,574 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:56,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:56,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:19:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 167. [2022-01-31 21:19:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-01-31 21:19:56,732 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 54 [2022-01-31 21:19:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:56,732 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-01-31 21:19:56,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-01-31 21:19:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:56,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:56,733 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:56,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2022-01-31 21:19:56,733 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:56,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash -314188966, now seen corresponding path program 225 times [2022-01-31 21:19:56,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:56,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091563310] [2022-01-31 21:19:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:56,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:56,734 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:56,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:56,735 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:56,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:56,932 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:56,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091563310] [2022-01-31 21:19:56,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2091563310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:56,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:56,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:56,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365238411] [2022-01-31 21:19:56,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:56,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:56,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:56,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:56,933 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:57,564 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:19:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:57,565 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:19:57,565 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:19:57,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:57,566 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:57,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:19:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 169. [2022-01-31 21:19:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-01-31 21:19:57,725 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 54 [2022-01-31 21:19:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:57,725 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-01-31 21:19:57,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-01-31 21:19:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:57,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:57,726 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:57,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2022-01-31 21:19:57,726 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1475879642, now seen corresponding path program 226 times [2022-01-31 21:19:57,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:57,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673382172] [2022-01-31 21:19:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:57,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:57,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:57,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:57,728 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:57,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:57,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:57,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673382172] [2022-01-31 21:19:57,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [673382172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:57,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:57,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:57,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062840234] [2022-01-31 21:19:57,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:57,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:57,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:57,971 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:58,563 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:19:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:58,563 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:58,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:58,564 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:19:58,564 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:19:58,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:58,565 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:58,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:19:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2022-01-31 21:19:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-01-31 21:19:58,735 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 54 [2022-01-31 21:19:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:58,735 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-01-31 21:19:58,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-01-31 21:19:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:58,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:58,735 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:58,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2022-01-31 21:19:58,735 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:58,736 INFO L85 PathProgramCache]: Analyzing trace with hash -550073766, now seen corresponding path program 227 times [2022-01-31 21:19:58,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:58,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100364795] [2022-01-31 21:19:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:58,736 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:58,737 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:58,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:58,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:58,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:58,904 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 21:19:58,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:58,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100364795] [2022-01-31 21:19:58,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100364795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:58,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:58,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:58,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775576415] [2022-01-31 21:19:58,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:58,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:58,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:58,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:58,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:58,919 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:19:59,463 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:19:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:19:59,463 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:19:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:19:59,464 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:19:59,464 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:19:59,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:19:59,465 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:19:59,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:19:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:19:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 173. [2022-01-31 21:19:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-01-31 21:19:59,630 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 54 [2022-01-31 21:19:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:19:59,630 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-01-31 21:19:59,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:19:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-01-31 21:19:59,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:19:59,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:19:59,631 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:19:59,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2022-01-31 21:19:59,631 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:19:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:19:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1871113766, now seen corresponding path program 228 times [2022-01-31 21:19:59,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:19:59,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772212115] [2022-01-31 21:19:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:19:59,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:19:59,632 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:19:59,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:19:59,633 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:19:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:59,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:19:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:19:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:19:59,865 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:19:59,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772212115] [2022-01-31 21:19:59,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772212115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:19:59,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:19:59,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:19:59,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886525822] [2022-01-31 21:19:59,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:19:59,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:19:59,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:19:59,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:19:59,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:19:59,866 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:00,542 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:20:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:20:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:20:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:00,543 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:20:00,543 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:20:00,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:20:00,544 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:00,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:20:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 175. [2022-01-31 21:20:00,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-01-31 21:20:00,707 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 54 [2022-01-31 21:20:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:00,707 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-01-31 21:20:00,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-01-31 21:20:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:20:00,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:00,708 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:00,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2022-01-31 21:20:00,708 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:00,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:00,708 INFO L85 PathProgramCache]: Analyzing trace with hash -80234150, now seen corresponding path program 229 times [2022-01-31 21:20:00,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:00,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810522999] [2022-01-31 21:20:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:00,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:00,710 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:00,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:00,710 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:00,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:00,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:00,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810522999] [2022-01-31 21:20:00,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [810522999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:00,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:00,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:20:00,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516226442] [2022-01-31 21:20:00,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:00,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:20:00,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:00,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:20:00,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:20:00,950 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:01,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:01,603 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:20:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:20:01,603 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:20:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:01,604 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:20:01,604 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:20:01,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:20:01,604 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:01,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:20:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 177. [2022-01-31 21:20:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-01-31 21:20:01,793 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 54 [2022-01-31 21:20:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:01,793 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-01-31 21:20:01,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-01-31 21:20:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:20:01,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:01,793 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:01,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2022-01-31 21:20:01,794 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1326808870, now seen corresponding path program 230 times [2022-01-31 21:20:01,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:01,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719532879] [2022-01-31 21:20:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:01,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:01,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:01,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:01,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:02,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:02,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:02,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719532879] [2022-01-31 21:20:02,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [719532879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:02,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:02,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:20:02,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757342852] [2022-01-31 21:20:02,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:02,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:20:02,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:20:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:20:02,014 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:02,692 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:20:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:20:02,693 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:20:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:02,693 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:20:02,693 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:20:02,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:20:02,694 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:02,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:20:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 139. [2022-01-31 21:20:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-01-31 21:20:02,810 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 54 [2022-01-31 21:20:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:02,810 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-01-31 21:20:02,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-01-31 21:20:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:02,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:02,811 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:02,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2022-01-31 21:20:02,811 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:02,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:02,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1318625859, now seen corresponding path program 231 times [2022-01-31 21:20:02,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:02,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006106110] [2022-01-31 21:20:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:02,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:02,812 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:02,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:02,813 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:03,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:03,077 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 21:20:03,077 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:03,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006106110] [2022-01-31 21:20:03,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006106110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:03,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:03,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:03,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232691936] [2022-01-31 21:20:03,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:03,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:03,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:03,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:03,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:03,078 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:03,544 INFO L93 Difference]: Finished difference Result 154 states and 222 transitions. [2022-01-31 21:20:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:03,545 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:03,545 INFO L225 Difference]: With dead ends: 154 [2022-01-31 21:20:03,545 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 21:20:03,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:03,546 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:03,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 25 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 21:20:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2022-01-31 21:20:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-01-31 21:20:03,677 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 56 [2022-01-31 21:20:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:03,678 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-01-31 21:20:03,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-01-31 21:20:03,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:03,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:03,678 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:03,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2022-01-31 21:20:03,678 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:03,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1881392445, now seen corresponding path program 232 times [2022-01-31 21:20:03,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:03,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227427462] [2022-01-31 21:20:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:03,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:03,679 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:03,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:03,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:03,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:03,890 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:03,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227427462] [2022-01-31 21:20:03,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [227427462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:03,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:03,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:03,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554536758] [2022-01-31 21:20:03,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:03,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:03,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:03,891 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:04,442 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-01-31 21:20:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:04,442 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:04,442 INFO L225 Difference]: With dead ends: 158 [2022-01-31 21:20:04,442 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:20:04,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:04,443 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:04,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:20:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2022-01-31 21:20:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-01-31 21:20:04,572 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 56 [2022-01-31 21:20:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:04,573 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-01-31 21:20:04,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-01-31 21:20:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:04,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:04,573 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:04,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2022-01-31 21:20:04,573 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:04,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1902398653, now seen corresponding path program 233 times [2022-01-31 21:20:04,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:04,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990015924] [2022-01-31 21:20:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:04,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:04,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:04,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:04,575 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:04,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:04,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:04,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990015924] [2022-01-31 21:20:04,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [990015924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:04,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:04,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:04,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471966659] [2022-01-31 21:20:04,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:04,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:04,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:04,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:04,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:04,782 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:05,341 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:20:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:05,341 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:05,341 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:20:05,341 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:20:05,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:05,342 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:05,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:05,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:20:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2022-01-31 21:20:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-01-31 21:20:05,480 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 56 [2022-01-31 21:20:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:05,480 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-01-31 21:20:05,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-01-31 21:20:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:05,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:05,480 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:05,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2022-01-31 21:20:05,481 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:05,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:05,481 INFO L85 PathProgramCache]: Analyzing trace with hash 614528061, now seen corresponding path program 234 times [2022-01-31 21:20:05,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:05,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685157015] [2022-01-31 21:20:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:05,482 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:05,482 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:05,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:05,482 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:05,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:05,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:05,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685157015] [2022-01-31 21:20:05,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1685157015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:05,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:05,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:05,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188038100] [2022-01-31 21:20:05,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:05,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:05,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:05,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:05,701 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:06,210 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:20:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:06,210 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:06,211 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:20:06,211 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:20:06,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:06,211 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:06,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:20:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2022-01-31 21:20:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-01-31 21:20:06,353 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 56 [2022-01-31 21:20:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:06,353 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-01-31 21:20:06,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-01-31 21:20:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:06,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:06,354 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:06,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2022-01-31 21:20:06,354 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:06,354 INFO L85 PathProgramCache]: Analyzing trace with hash -78529603, now seen corresponding path program 235 times [2022-01-31 21:20:06,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:06,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400181699] [2022-01-31 21:20:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:06,355 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:06,355 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:06,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:06,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:06,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:06,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:06,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400181699] [2022-01-31 21:20:06,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [400181699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:06,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:06,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:06,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121673539] [2022-01-31 21:20:06,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:06,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:06,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:06,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:06,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:06,515 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:07,054 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:20:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:07,054 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:07,055 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:20:07,055 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:20:07,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:07,055 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:07,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:20:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2022-01-31 21:20:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-01-31 21:20:07,216 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 56 [2022-01-31 21:20:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:07,216 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-01-31 21:20:07,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-01-31 21:20:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:07,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:07,217 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:07,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2022-01-31 21:20:07,217 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:07,217 INFO L85 PathProgramCache]: Analyzing trace with hash -387013827, now seen corresponding path program 236 times [2022-01-31 21:20:07,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:07,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544489361] [2022-01-31 21:20:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:07,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:07,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:07,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:07,219 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:07,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:07,489 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:07,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544489361] [2022-01-31 21:20:07,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [544489361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:07,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:07,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:07,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222387317] [2022-01-31 21:20:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:07,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:07,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:07,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:07,490 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:08,136 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:20:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:08,136 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:08,136 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:20:08,136 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:20:08,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:08,137 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:08,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:20:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 155. [2022-01-31 21:20:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-01-31 21:20:08,280 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 56 [2022-01-31 21:20:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:08,280 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-01-31 21:20:08,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-01-31 21:20:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:08,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:08,281 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:08,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2022-01-31 21:20:08,281 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:08,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:08,281 INFO L85 PathProgramCache]: Analyzing trace with hash -487609667, now seen corresponding path program 237 times [2022-01-31 21:20:08,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:08,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322526534] [2022-01-31 21:20:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:08,282 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:08,282 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:08,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:08,282 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:08,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:08,538 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 21:20:08,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:08,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322526534] [2022-01-31 21:20:08,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322526534] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:08,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:08,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:08,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913121852] [2022-01-31 21:20:08,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:08,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:08,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:08,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:08,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:08,539 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:09,154 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:20:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:09,154 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:09,155 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:20:09,155 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:20:09,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:09,160 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:09,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:20:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 157. [2022-01-31 21:20:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-01-31 21:20:09,311 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 56 [2022-01-31 21:20:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:09,311 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-01-31 21:20:09,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-01-31 21:20:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:09,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:09,312 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:09,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2022-01-31 21:20:09,312 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1624035901, now seen corresponding path program 238 times [2022-01-31 21:20:09,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:09,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622575378] [2022-01-31 21:20:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:09,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:09,313 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:09,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:09,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:09,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:09,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622575378] [2022-01-31 21:20:09,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [622575378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:09,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:09,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:09,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088302793] [2022-01-31 21:20:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:09,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:09,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:09,574 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:10,259 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:20:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:10,260 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:10,260 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:20:10,260 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:20:10,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:10,261 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:10,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:20:10,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 159. [2022-01-31 21:20:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-01-31 21:20:10,416 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 56 [2022-01-31 21:20:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:10,416 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-01-31 21:20:10,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-01-31 21:20:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:10,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:10,417 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:10,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2022-01-31 21:20:10,417 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:10,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash -604104259, now seen corresponding path program 239 times [2022-01-31 21:20:10,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:10,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830763694] [2022-01-31 21:20:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:10,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:10,418 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:10,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:10,419 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:10,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:10,676 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:10,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830763694] [2022-01-31 21:20:10,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [830763694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:10,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:10,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:10,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332750679] [2022-01-31 21:20:10,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:10,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:10,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:10,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:10,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:10,677 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:11,321 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:20:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:11,321 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:11,321 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:20:11,321 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:20:11,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:11,322 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:11,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:20:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 161. [2022-01-31 21:20:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:11,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-01-31 21:20:11,477 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 56 [2022-01-31 21:20:11,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:11,478 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-01-31 21:20:11,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:11,478 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-01-31 21:20:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:11,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:11,478 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:11,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2022-01-31 21:20:11,478 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:11,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1341882685, now seen corresponding path program 240 times [2022-01-31 21:20:11,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:11,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523751068] [2022-01-31 21:20:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:11,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:11,479 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:11,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:11,480 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:11,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:11,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:11,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:11,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523751068] [2022-01-31 21:20:11,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1523751068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:11,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:11,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:11,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314967026] [2022-01-31 21:20:11,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:11,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:11,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:11,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:11,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:11,663 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:12,200 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:20:12,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:12,201 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:12,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:12,201 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:20:12,201 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:20:12,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:12,201 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:12,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:20:12,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 163. [2022-01-31 21:20:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:12,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-01-31 21:20:12,365 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 56 [2022-01-31 21:20:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:12,365 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-01-31 21:20:12,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-01-31 21:20:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:12,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:12,366 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:12,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2022-01-31 21:20:12,366 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:12,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:12,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1170405187, now seen corresponding path program 241 times [2022-01-31 21:20:12,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:12,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256974484] [2022-01-31 21:20:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:12,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:12,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:12,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:12,367 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:12,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:12,527 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:12,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256974484] [2022-01-31 21:20:12,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1256974484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:12,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:12,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:12,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587524532] [2022-01-31 21:20:12,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:12,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:12,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:12,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:12,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:12,528 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:13,091 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:20:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:13,092 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:13,092 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:20:13,092 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:20:13,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:13,092 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:13,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:20:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2022-01-31 21:20:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-01-31 21:20:13,258 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 56 [2022-01-31 21:20:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:13,258 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-01-31 21:20:13,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:13,258 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-01-31 21:20:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:13,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:13,259 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:13,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2022-01-31 21:20:13,259 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:13,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:13,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1707429827, now seen corresponding path program 242 times [2022-01-31 21:20:13,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:13,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517702213] [2022-01-31 21:20:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:13,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:13,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:13,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:13,261 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:13,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:13,414 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517702213] [2022-01-31 21:20:13,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [517702213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:13,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:13,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:13,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769137161] [2022-01-31 21:20:13,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:13,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:13,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:13,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:13,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:13,415 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:14,004 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:20:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:14,004 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:20:14,004 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:20:14,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:14,005 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:14,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:20:14,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2022-01-31 21:20:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-01-31 21:20:14,172 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 56 [2022-01-31 21:20:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:14,173 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-01-31 21:20:14,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:14,173 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-01-31 21:20:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:14,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:14,173 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:14,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2022-01-31 21:20:14,173 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:14,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1902933949, now seen corresponding path program 243 times [2022-01-31 21:20:14,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:14,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336170484] [2022-01-31 21:20:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:14,174 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:14,174 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:14,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:14,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:14,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:14,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:14,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336170484] [2022-01-31 21:20:14,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [336170484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:14,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:14,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:14,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914455694] [2022-01-31 21:20:14,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:14,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:14,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:14,430 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:15,007 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:20:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:15,007 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:15,007 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:20:15,007 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:20:15,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:15,008 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:15,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 25 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:20:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2022-01-31 21:20:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-01-31 21:20:15,188 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 56 [2022-01-31 21:20:15,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:15,188 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-01-31 21:20:15,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-01-31 21:20:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:15,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:15,188 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:15,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2022-01-31 21:20:15,189 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1128947517, now seen corresponding path program 244 times [2022-01-31 21:20:15,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:15,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199973445] [2022-01-31 21:20:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:15,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:15,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:15,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:15,190 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:15,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:15,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:15,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199973445] [2022-01-31 21:20:15,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199973445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:15,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:15,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:15,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271690419] [2022-01-31 21:20:15,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:15,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:15,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:15,347 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:15,959 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:20:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:15,959 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:15,959 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:20:15,959 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:20:15,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:15,960 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:15,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:20:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 171. [2022-01-31 21:20:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-01-31 21:20:16,136 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 56 [2022-01-31 21:20:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:16,136 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-01-31 21:20:16,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-01-31 21:20:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:16,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:16,136 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:16,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2022-01-31 21:20:16,136 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:16,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:16,137 INFO L85 PathProgramCache]: Analyzing trace with hash 357328573, now seen corresponding path program 245 times [2022-01-31 21:20:16,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:16,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946827971] [2022-01-31 21:20:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:16,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:16,138 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:16,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:16,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:16,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:16,397 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:16,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946827971] [2022-01-31 21:20:16,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [946827971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:16,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:16,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:16,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603192689] [2022-01-31 21:20:16,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:16,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:16,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:16,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:16,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:16,398 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:17,075 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:20:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:17,076 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:20:17,076 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:20:17,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:17,076 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:17,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:20:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 173. [2022-01-31 21:20:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-01-31 21:20:17,257 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 56 [2022-01-31 21:20:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:17,257 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-01-31 21:20:17,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-01-31 21:20:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:17,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:17,258 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:17,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2022-01-31 21:20:17,258 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1860865597, now seen corresponding path program 246 times [2022-01-31 21:20:17,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:17,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275796274] [2022-01-31 21:20:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:17,259 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:17,259 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:17,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:17,260 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:17,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:17,481 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:17,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275796274] [2022-01-31 21:20:17,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1275796274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:17,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:17,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:17,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105387279] [2022-01-31 21:20:17,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:17,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:17,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:17,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:17,482 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:18,167 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:20:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:18,167 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:18,168 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:20:18,168 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:20:18,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:18,168 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:18,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:20:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 175. [2022-01-31 21:20:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-01-31 21:20:18,352 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 56 [2022-01-31 21:20:18,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:18,352 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-01-31 21:20:18,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-01-31 21:20:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:18,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:18,353 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:18,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2022-01-31 21:20:18,353 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:18,353 INFO L85 PathProgramCache]: Analyzing trace with hash -644033091, now seen corresponding path program 247 times [2022-01-31 21:20:18,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:18,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057140417] [2022-01-31 21:20:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:18,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:18,354 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:18,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:18,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:18,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:18,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057140417] [2022-01-31 21:20:18,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1057140417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:18,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:18,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:18,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663792845] [2022-01-31 21:20:18,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:18,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:18,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:18,565 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:19,268 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:20:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:19,268 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:19,268 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:20:19,268 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:20:19,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:19,269 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:19,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:20:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 177. [2022-01-31 21:20:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-01-31 21:20:19,450 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 56 [2022-01-31 21:20:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:19,450 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-01-31 21:20:19,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-01-31 21:20:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:19,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:19,450 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:19,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2022-01-31 21:20:19,450 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:19,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1624980797, now seen corresponding path program 248 times [2022-01-31 21:20:19,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:19,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465222762] [2022-01-31 21:20:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:19,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:19,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:19,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:19,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:19,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:19,672 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465222762] [2022-01-31 21:20:19,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [465222762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:19,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:19,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:19,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769083305] [2022-01-31 21:20:19,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:19,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:19,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:19,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:19,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:19,673 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:20,384 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:20:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:20,384 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:20,384 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:20:20,384 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:20:20,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:20,385 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:20,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:20:20,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 179. [2022-01-31 21:20:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-01-31 21:20:20,574 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 56 [2022-01-31 21:20:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:20,574 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-01-31 21:20:20,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-01-31 21:20:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:20,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:20,574 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:20,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2022-01-31 21:20:20,575 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 303940797, now seen corresponding path program 249 times [2022-01-31 21:20:20,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:20,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793702838] [2022-01-31 21:20:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:20,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:20,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:20,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:20,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:20,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:20,840 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 21:20:20,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:20,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793702838] [2022-01-31 21:20:20,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793702838] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:20,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:20,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:20,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933606282] [2022-01-31 21:20:20,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:20,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:20,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:20,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:20,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:20,841 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:21,628 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:20:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:21,629 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:21,629 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:20:21,630 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:20:21,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:21,630 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:21,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:20:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 181. [2022-01-31 21:20:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:21,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-01-31 21:20:21,819 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 56 [2022-01-31 21:20:21,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:21,819 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-01-31 21:20:21,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:21,820 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-01-31 21:20:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:21,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:21,820 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:21,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2022-01-31 21:20:21,820 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:21,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2094820413, now seen corresponding path program 250 times [2022-01-31 21:20:21,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:21,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209938894] [2022-01-31 21:20:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:21,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:21,821 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:21,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:21,822 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:22,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:22,076 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209938894] [2022-01-31 21:20:22,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [209938894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:22,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:22,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:22,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104265487] [2022-01-31 21:20:22,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:22,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:22,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:22,077 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:22,743 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:20:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:22,743 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:22,743 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:20:22,744 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:20:22,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:22,744 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:22,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:20:22,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 183. [2022-01-31 21:20:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-01-31 21:20:22,935 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 56 [2022-01-31 21:20:22,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:22,935 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-01-31 21:20:22,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-01-31 21:20:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:22,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:22,936 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:22,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2022-01-31 21:20:22,936 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash 848245693, now seen corresponding path program 251 times [2022-01-31 21:20:22,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:22,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790386627] [2022-01-31 21:20:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:22,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:22,937 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:22,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:22,938 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:23,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:23,106 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 21:20:23,106 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:23,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790386627] [2022-01-31 21:20:23,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790386627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:23,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:23,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:23,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367197646] [2022-01-31 21:20:23,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:23,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:23,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:23,107 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:23,727 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:20:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:23,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:23,728 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:20:23,728 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:20:23,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:23,728 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:23,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 15 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:20:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 185. [2022-01-31 21:20:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-01-31 21:20:23,918 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 56 [2022-01-31 21:20:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:23,918 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-01-31 21:20:23,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-01-31 21:20:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:20:23,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:23,918 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:23,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2022-01-31 21:20:23,919 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1185815357, now seen corresponding path program 252 times [2022-01-31 21:20:23,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:23,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276502026] [2022-01-31 21:20:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:23,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:23,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:23,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:23,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:24,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:24,114 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:24,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276502026] [2022-01-31 21:20:24,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1276502026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:24,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:24,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:20:24,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120503028] [2022-01-31 21:20:24,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:24,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:20:24,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:20:24,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:20:24,115 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:24,677 INFO L93 Difference]: Finished difference Result 234 states and 341 transitions. [2022-01-31 21:20:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:20:24,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:20:24,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:24,678 INFO L225 Difference]: With dead ends: 234 [2022-01-31 21:20:24,678 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 21:20:24,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:20:24,678 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:24,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 21:20:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 145. [2022-01-31 21:20:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-01-31 21:20:24,808 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 56 [2022-01-31 21:20:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:24,808 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-01-31 21:20:24,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-01-31 21:20:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:24,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:24,808 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:24,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2022-01-31 21:20:24,808 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:24,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1554703328, now seen corresponding path program 253 times [2022-01-31 21:20:24,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:24,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931650618] [2022-01-31 21:20:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:24,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:24,809 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:24,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:24,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:24,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:24,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:24,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931650618] [2022-01-31 21:20:24,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [931650618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:24,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:24,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:24,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919578459] [2022-01-31 21:20:24,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:24,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:24,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:24,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:24,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:24,990 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:25,612 INFO L93 Difference]: Finished difference Result 160 states and 231 transitions. [2022-01-31 21:20:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:25,618 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:25,620 INFO L225 Difference]: With dead ends: 160 [2022-01-31 21:20:25,620 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 21:20:25,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:25,622 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 88 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:25,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 23 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 21:20:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2022-01-31 21:20:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-01-31 21:20:25,764 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 58 [2022-01-31 21:20:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:25,764 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-01-31 21:20:25,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-01-31 21:20:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:25,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:25,765 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:25,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2022-01-31 21:20:25,765 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:25,765 INFO L85 PathProgramCache]: Analyzing trace with hash 459754336, now seen corresponding path program 254 times [2022-01-31 21:20:25,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:25,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301429507] [2022-01-31 21:20:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:25,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:25,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:25,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:25,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:26,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:26,051 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:26,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301429507] [2022-01-31 21:20:26,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [301429507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:26,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:26,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:26,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389796920] [2022-01-31 21:20:26,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:26,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:26,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:26,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:26,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:26,052 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:26,750 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-01-31 21:20:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:26,751 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:26,751 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:20:26,751 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 21:20:26,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:26,752 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:26,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 21:20:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2022-01-31 21:20:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-01-31 21:20:26,897 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 58 [2022-01-31 21:20:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:26,897 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-01-31 21:20:26,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-01-31 21:20:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:26,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:26,897 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:26,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2022-01-31 21:20:26,897 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash 480760544, now seen corresponding path program 255 times [2022-01-31 21:20:26,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:26,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938824336] [2022-01-31 21:20:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:26,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:26,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:26,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:26,899 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:27,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:27,181 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 21:20:27,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938824336] [2022-01-31 21:20:27,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [938824336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:27,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:27,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:27,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20652266] [2022-01-31 21:20:27,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:27,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:27,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:27,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:27,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:27,182 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:27,829 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:20:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:27,830 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:27,830 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:20:27,830 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:20:27,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:27,831 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:27,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:20:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2022-01-31 21:20:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-01-31 21:20:27,986 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 58 [2022-01-31 21:20:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:27,986 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-01-31 21:20:27,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:27,986 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-01-31 21:20:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:27,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:27,987 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:27,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2022-01-31 21:20:27,987 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash -807110048, now seen corresponding path program 256 times [2022-01-31 21:20:27,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:27,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428358995] [2022-01-31 21:20:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:27,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:27,988 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:27,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:27,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:28,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:28,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:28,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428358995] [2022-01-31 21:20:28,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [428358995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:28,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:28,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:28,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297828400] [2022-01-31 21:20:28,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:28,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:28,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:28,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:28,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:28,272 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:28,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:28,939 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:20:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:28,939 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:28,940 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:20:28,940 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:20:28,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:28,940 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:28,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 33 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:20:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2022-01-31 21:20:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-01-31 21:20:29,093 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 58 [2022-01-31 21:20:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:29,093 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-01-31 21:20:29,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-01-31 21:20:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:29,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:29,093 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:29,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2022-01-31 21:20:29,094 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1500167712, now seen corresponding path program 257 times [2022-01-31 21:20:29,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:29,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739321552] [2022-01-31 21:20:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:29,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:29,095 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:29,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:29,095 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:29,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:29,353 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 21:20:29,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:29,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739321552] [2022-01-31 21:20:29,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [739321552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:29,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:29,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:29,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983412381] [2022-01-31 21:20:29,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:29,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:29,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:29,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:29,354 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:29,915 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:20:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:29,915 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:29,916 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:20:29,916 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:20:29,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:29,916 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:29,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:20:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2022-01-31 21:20:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-01-31 21:20:30,087 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 58 [2022-01-31 21:20:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:30,087 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-01-31 21:20:30,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-01-31 21:20:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:30,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:30,087 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:30,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2022-01-31 21:20:30,088 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:30,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1808651936, now seen corresponding path program 258 times [2022-01-31 21:20:30,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:30,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386993984] [2022-01-31 21:20:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:30,089 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:30,089 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:30,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:30,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:30,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:30,260 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:30,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386993984] [2022-01-31 21:20:30,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1386993984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:30,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:30,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:30,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925867024] [2022-01-31 21:20:30,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:30,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:30,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:30,261 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:30,802 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:20:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:30,802 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:30,802 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:20:30,802 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:20:30,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:30,803 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:30,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:20:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 161. [2022-01-31 21:20:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-01-31 21:20:30,968 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 58 [2022-01-31 21:20:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:30,968 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-01-31 21:20:30,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-01-31 21:20:30,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:30,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:30,969 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:30,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2022-01-31 21:20:30,969 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:30,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1909247776, now seen corresponding path program 259 times [2022-01-31 21:20:30,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:30,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862509251] [2022-01-31 21:20:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:30,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:30,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:30,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:30,971 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:31,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:31,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862509251] [2022-01-31 21:20:31,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1862509251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:31,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:31,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:31,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064592389] [2022-01-31 21:20:31,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:31,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:31,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:31,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:31,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:31,190 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:31,745 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:20:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:31,746 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:31,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:31,746 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:20:31,746 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:20:31,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:31,746 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:31,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:31,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:20:31,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 163. [2022-01-31 21:20:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-01-31 21:20:31,914 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 58 [2022-01-31 21:20:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:31,914 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-01-31 21:20:31,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-01-31 21:20:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:31,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:31,914 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:31,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2022-01-31 21:20:31,914 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:31,915 INFO L85 PathProgramCache]: Analyzing trace with hash 202397792, now seen corresponding path program 260 times [2022-01-31 21:20:31,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:31,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407963383] [2022-01-31 21:20:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:31,916 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:31,916 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:31,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:31,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:32,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:32,137 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 21:20:32,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:32,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407963383] [2022-01-31 21:20:32,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1407963383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:32,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:32,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:32,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033288406] [2022-01-31 21:20:32,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:32,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:32,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:32,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:32,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:32,138 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:32,880 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:20:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:32,880 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:32,881 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:20:32,881 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:20:32,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:32,881 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:32,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:20:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 165. [2022-01-31 21:20:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-01-31 21:20:33,049 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 58 [2022-01-31 21:20:33,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:33,049 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-01-31 21:20:33,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:33,049 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-01-31 21:20:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:33,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:33,050 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:33,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2022-01-31 21:20:33,050 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:33,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2025742368, now seen corresponding path program 261 times [2022-01-31 21:20:33,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:33,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342875500] [2022-01-31 21:20:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:33,051 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:33,051 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:33,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:33,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:33,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:33,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:33,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342875500] [2022-01-31 21:20:33,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [342875500] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:33,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:33,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:33,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948960302] [2022-01-31 21:20:33,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:33,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:33,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:33,327 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:33,961 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:20:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:33,961 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:33,961 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:20:33,961 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:20:33,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:33,962 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:33,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:33,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:20:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2022-01-31 21:20:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-01-31 21:20:34,133 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 58 [2022-01-31 21:20:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:34,133 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-01-31 21:20:34,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-01-31 21:20:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:34,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:34,133 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:34,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2022-01-31 21:20:34,133 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:34,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash -79755424, now seen corresponding path program 262 times [2022-01-31 21:20:34,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:34,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076435428] [2022-01-31 21:20:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:34,135 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:34,135 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:34,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:34,135 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:34,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:34,367 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:34,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076435428] [2022-01-31 21:20:34,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076435428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:34,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:34,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:34,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650011143] [2022-01-31 21:20:34,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:34,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:34,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:34,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:34,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:34,368 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:35,043 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:20:35,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:35,044 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:35,044 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:20:35,044 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:20:35,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:35,044 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:35,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:20:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 169. [2022-01-31 21:20:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-01-31 21:20:35,219 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 58 [2022-01-31 21:20:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:35,219 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-01-31 21:20:35,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-01-31 21:20:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:35,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:35,220 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:35,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2022-01-31 21:20:35,220 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:35,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1702924000, now seen corresponding path program 263 times [2022-01-31 21:20:35,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:35,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416176115] [2022-01-31 21:20:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:35,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:35,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:35,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:35,221 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:35,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:35,497 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:35,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416176115] [2022-01-31 21:20:35,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [416176115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:35,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:35,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:35,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173369289] [2022-01-31 21:20:35,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:35,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:35,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:35,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:35,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:35,498 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:36,208 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:20:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:36,209 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:36,210 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:20:36,210 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:20:36,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:36,210 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:36,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:36,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:20:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 171. [2022-01-31 21:20:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-01-31 21:20:36,399 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 58 [2022-01-31 21:20:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:36,399 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-01-31 21:20:36,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-01-31 21:20:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:36,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:36,399 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:36,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2022-01-31 21:20:36,400 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1165899360, now seen corresponding path program 264 times [2022-01-31 21:20:36,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:36,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089074937] [2022-01-31 21:20:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:36,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:36,401 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:36,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:36,401 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:36,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:36,658 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089074937] [2022-01-31 21:20:36,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089074937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:36,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:36,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:36,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668664177] [2022-01-31 21:20:36,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:36,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:36,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:36,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:36,659 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:37,434 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:20:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:37,434 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:37,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:37,434 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:20:37,434 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:20:37,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:37,435 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:37,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:37,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:20:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 173. [2022-01-31 21:20:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-01-31 21:20:37,622 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 58 [2022-01-31 21:20:37,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:37,622 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-01-31 21:20:37,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-01-31 21:20:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:37,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:37,623 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:37,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2022-01-31 21:20:37,623 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash 481295840, now seen corresponding path program 265 times [2022-01-31 21:20:37,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:37,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722392145] [2022-01-31 21:20:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:37,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:37,625 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:37,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:37,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:37,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:37,826 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722392145] [2022-01-31 21:20:37,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1722392145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:37,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:37,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:37,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573161397] [2022-01-31 21:20:37,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:37,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:37,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:37,827 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:38,452 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:20:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:38,452 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:38,452 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:20:38,453 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:20:38,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:38,453 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:38,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 23 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:20:38,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 175. [2022-01-31 21:20:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-01-31 21:20:38,649 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 58 [2022-01-31 21:20:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:38,650 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-01-31 21:20:38,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-01-31 21:20:38,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:38,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:38,650 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:38,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2022-01-31 21:20:38,650 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash -292690592, now seen corresponding path program 266 times [2022-01-31 21:20:38,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:38,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568028393] [2022-01-31 21:20:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:38,651 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:38,651 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:38,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:38,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:38,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:38,818 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:38,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568028393] [2022-01-31 21:20:38,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [568028393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:38,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:38,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:38,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167327978] [2022-01-31 21:20:38,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:38,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:38,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:38,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:38,819 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:39,474 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:20:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:39,474 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:39,474 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:20:39,474 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:20:39,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:39,475 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:39,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 18 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:20:39,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2022-01-31 21:20:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-01-31 21:20:39,668 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 58 [2022-01-31 21:20:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:39,668 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-01-31 21:20:39,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-01-31 21:20:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:39,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:39,669 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:39,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2022-01-31 21:20:39,669 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1064309536, now seen corresponding path program 267 times [2022-01-31 21:20:39,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:39,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353980413] [2022-01-31 21:20:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:39,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:39,671 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:39,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:39,671 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:39,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:39,908 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 21:20:39,908 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:39,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353980413] [2022-01-31 21:20:39,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [353980413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:39,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:39,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:39,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763795156] [2022-01-31 21:20:39,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:39,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:39,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:39,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:39,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:39,909 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:40,654 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:20:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:40,654 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:40,654 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:20:40,654 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:20:40,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:40,655 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:40,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 25 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:20:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 179. [2022-01-31 21:20:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-01-31 21:20:40,855 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 58 [2022-01-31 21:20:40,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:40,855 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-01-31 21:20:40,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-01-31 21:20:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:40,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:40,856 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:40,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2022-01-31 21:20:40,856 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:40,856 INFO L85 PathProgramCache]: Analyzing trace with hash 439227488, now seen corresponding path program 268 times [2022-01-31 21:20:40,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:40,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515155905] [2022-01-31 21:20:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:40,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:40,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:40,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:40,857 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:41,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:41,129 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:41,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515155905] [2022-01-31 21:20:41,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [515155905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:41,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:41,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:41,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187527069] [2022-01-31 21:20:41,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:41,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:41,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:41,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:41,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:41,130 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:41,944 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:20:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:41,945 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:41,945 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:20:41,945 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:20:41,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:41,945 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:41,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 23 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:20:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 181. [2022-01-31 21:20:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-01-31 21:20:42,153 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 58 [2022-01-31 21:20:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:42,153 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-01-31 21:20:42,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-01-31 21:20:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:42,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:42,154 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:42,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2022-01-31 21:20:42,154 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2065671200, now seen corresponding path program 269 times [2022-01-31 21:20:42,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:42,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057358346] [2022-01-31 21:20:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:42,155 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:42,155 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:42,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:42,156 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:42,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:42,432 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:42,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057358346] [2022-01-31 21:20:42,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2057358346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:42,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:42,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:42,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2313642] [2022-01-31 21:20:42,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:42,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:42,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:42,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:42,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:42,433 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:43,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:43,255 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:20:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:43,255 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:43,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:43,256 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:20:43,256 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:20:43,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:43,256 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:43,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:20:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 183. [2022-01-31 21:20:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-01-31 21:20:43,460 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 58 [2022-01-31 21:20:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:43,460 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-01-31 21:20:43,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-01-31 21:20:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:43,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:43,460 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:43,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2022-01-31 21:20:43,461 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:43,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:43,461 INFO L85 PathProgramCache]: Analyzing trace with hash 203342688, now seen corresponding path program 270 times [2022-01-31 21:20:43,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:43,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510432766] [2022-01-31 21:20:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:43,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:43,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:43,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:43,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:43,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:43,689 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:43,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510432766] [2022-01-31 21:20:43,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1510432766] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:43,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:43,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:43,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949149440] [2022-01-31 21:20:43,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:43,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:43,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:43,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:43,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:43,690 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:44,486 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:20:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:44,487 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:20:44,487 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:20:44,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:44,487 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:44,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:20:44,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 185. [2022-01-31 21:20:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-01-31 21:20:44,699 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 58 [2022-01-31 21:20:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:44,699 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-01-31 21:20:44,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-01-31 21:20:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:44,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:44,700 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:44,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2022-01-31 21:20:44,700 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1117697312, now seen corresponding path program 271 times [2022-01-31 21:20:44,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:44,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858825810] [2022-01-31 21:20:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:44,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:44,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:44,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:44,702 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:44,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:44,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:44,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858825810] [2022-01-31 21:20:44,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [858825810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:44,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:44,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:44,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292878632] [2022-01-31 21:20:44,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:44,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:44,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:44,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:44,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:44,977 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:45,803 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:20:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:45,803 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:45,804 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:20:45,804 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:20:45,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:45,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:45,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:20:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 187. [2022-01-31 21:20:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-01-31 21:20:46,020 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 58 [2022-01-31 21:20:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:46,020 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-01-31 21:20:46,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-01-31 21:20:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:46,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:46,020 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:46,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2022-01-31 21:20:46,021 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:46,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:46,021 INFO L85 PathProgramCache]: Analyzing trace with hash 673182304, now seen corresponding path program 272 times [2022-01-31 21:20:46,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:46,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208372080] [2022-01-31 21:20:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:46,022 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:46,022 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:46,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:46,022 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:46,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:46,303 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:46,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208372080] [2022-01-31 21:20:46,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1208372080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:46,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:46,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:46,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151151188] [2022-01-31 21:20:46,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:46,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:46,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:46,304 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:47,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:47,027 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:20:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:47,027 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:47,027 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:20:47,027 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:20:47,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:47,028 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:47,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:20:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 189. [2022-01-31 21:20:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-01-31 21:20:47,297 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 58 [2022-01-31 21:20:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:47,297 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-01-31 21:20:47,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-01-31 21:20:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:47,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:47,298 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:47,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2022-01-31 21:20:47,298 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash -573392416, now seen corresponding path program 273 times [2022-01-31 21:20:47,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:47,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861454727] [2022-01-31 21:20:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:47,299 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:47,299 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:47,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:47,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:47,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:47,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:47,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861454727] [2022-01-31 21:20:47,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [861454727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:47,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:47,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:47,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910321946] [2022-01-31 21:20:47,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:47,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:47,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:47,569 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:48,316 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:20:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:48,316 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:48,316 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:20:48,316 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:20:48,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:48,317 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:48,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:48,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:20:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 191. [2022-01-31 21:20:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-01-31 21:20:48,533 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 58 [2022-01-31 21:20:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:48,533 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-01-31 21:20:48,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-01-31 21:20:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:48,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:48,533 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:48,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2022-01-31 21:20:48,533 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:48,533 INFO L85 PathProgramCache]: Analyzing trace with hash -235822752, now seen corresponding path program 274 times [2022-01-31 21:20:48,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:48,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113658396] [2022-01-31 21:20:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:48,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:48,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:48,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:48,535 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:48,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:48,761 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113658396] [2022-01-31 21:20:48,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113658396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:48,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:48,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:48,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265106133] [2022-01-31 21:20:48,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:48,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:48,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:48,762 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:49,542 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:20:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:49,543 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:20:49,543 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:20:49,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:49,543 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:49,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 25 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:20:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 193. [2022-01-31 21:20:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:49,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-01-31 21:20:49,758 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 58 [2022-01-31 21:20:49,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:49,758 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-01-31 21:20:49,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-01-31 21:20:49,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:20:49,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:49,759 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:49,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2022-01-31 21:20:49,759 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2046077152, now seen corresponding path program 275 times [2022-01-31 21:20:49,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:49,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430239500] [2022-01-31 21:20:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:49,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:49,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:49,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:49,761 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:49,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:49,985 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:49,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430239500] [2022-01-31 21:20:49,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [430239500] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:49,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:49,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:20:49,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142762287] [2022-01-31 21:20:49,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:49,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:20:49,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:49,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:20:49,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:20:49,986 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:50,738 INFO L93 Difference]: Finished difference Result 244 states and 356 transitions. [2022-01-31 21:20:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:20:50,738 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:20:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:50,739 INFO L225 Difference]: With dead ends: 244 [2022-01-31 21:20:50,739 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 21:20:50,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:20:50,739 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:50,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 21:20:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 151. [2022-01-31 21:20:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-01-31 21:20:50,894 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 58 [2022-01-31 21:20:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:50,895 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-01-31 21:20:50,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-01-31 21:20:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:20:50,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:50,895 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:50,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2022-01-31 21:20:50,895 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:50,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:50,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1160080707, now seen corresponding path program 276 times [2022-01-31 21:20:50,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:50,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860475688] [2022-01-31 21:20:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:50,896 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:50,896 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:50,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:50,897 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:51,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:51,203 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 21:20:51,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:51,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860475688] [2022-01-31 21:20:51,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [860475688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:51,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:51,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:20:51,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137544429] [2022-01-31 21:20:51,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:51,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:20:51,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:51,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:20:51,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:20:51,204 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:51,946 INFO L93 Difference]: Finished difference Result 166 states and 240 transitions. [2022-01-31 21:20:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:20:51,946 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:20:51,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:51,946 INFO L225 Difference]: With dead ends: 166 [2022-01-31 21:20:51,947 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 21:20:51,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:20:51,947 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:51,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 17 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 21:20:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-01-31 21:20:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-01-31 21:20:52,112 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 60 [2022-01-31 21:20:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:52,112 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-01-31 21:20:52,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-01-31 21:20:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:20:52,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:52,113 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:52,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2022-01-31 21:20:52,113 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash 65131715, now seen corresponding path program 277 times [2022-01-31 21:20:52,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:52,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722056784] [2022-01-31 21:20:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:52,119 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:52,119 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:52,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:52,120 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:52,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:52,419 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 21:20:52,419 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:52,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722056784] [2022-01-31 21:20:52,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [722056784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:52,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:52,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:20:52,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925471185] [2022-01-31 21:20:52,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:52,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:20:52,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:52,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:20:52,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:20:52,420 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:53,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:53,142 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-01-31 21:20:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:20:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:20:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:53,143 INFO L225 Difference]: With dead ends: 170 [2022-01-31 21:20:53,143 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:20:53,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:20:53,143 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:53,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 23 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:20:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 159. [2022-01-31 21:20:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-01-31 21:20:53,307 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 60 [2022-01-31 21:20:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:53,307 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-01-31 21:20:53,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-01-31 21:20:53,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:20:53,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:53,308 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:53,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2022-01-31 21:20:53,308 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:53,308 INFO L85 PathProgramCache]: Analyzing trace with hash 86137923, now seen corresponding path program 278 times [2022-01-31 21:20:53,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:53,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066188710] [2022-01-31 21:20:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:53,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:53,313 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:53,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:53,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:53,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:53,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:53,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066188710] [2022-01-31 21:20:53,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2066188710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:53,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:53,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:20:53,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69219196] [2022-01-31 21:20:53,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:53,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:20:53,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:53,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:20:53,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:20:53,567 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:54,309 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:20:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:20:54,309 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:20:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:54,309 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:20:54,309 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:20:54,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:20:54,310 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:54,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:20:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2022-01-31 21:20:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-01-31 21:20:54,481 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 60 [2022-01-31 21:20:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:54,481 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-01-31 21:20:54,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-01-31 21:20:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:20:54,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:54,481 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:54,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2022-01-31 21:20:54,481 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1201732669, now seen corresponding path program 279 times [2022-01-31 21:20:54,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:54,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278844116] [2022-01-31 21:20:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:54,482 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:54,482 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:54,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:54,483 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:54,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:54,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278844116] [2022-01-31 21:20:54,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1278844116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:54,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:54,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:20:54,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356801325] [2022-01-31 21:20:54,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:54,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:20:54,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:54,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:20:54,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:20:54,768 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:55,472 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:20:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:20:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:20:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:55,473 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:20:55,473 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:20:55,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:20:55,473 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:55,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:20:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 163. [2022-01-31 21:20:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-01-31 21:20:55,649 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 60 [2022-01-31 21:20:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:55,650 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-01-31 21:20:55,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-01-31 21:20:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:20:55,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:55,650 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:55,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2022-01-31 21:20:55,650 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:55,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1894790333, now seen corresponding path program 280 times [2022-01-31 21:20:55,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:55,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24124700] [2022-01-31 21:20:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:55,651 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:55,651 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:55,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:55,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:55,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:55,894 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24124700] [2022-01-31 21:20:55,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [24124700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:55,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:55,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:20:55,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578880957] [2022-01-31 21:20:55,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:55,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:20:55,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:55,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:20:55,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:20:55,895 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:56,603 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:20:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:20:56,603 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:20:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:56,604 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:20:56,604 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:20:56,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:20:56,604 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:56,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:56,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:20:56,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2022-01-31 21:20:56,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-01-31 21:20:56,783 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 60 [2022-01-31 21:20:56,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:56,783 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-01-31 21:20:56,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-01-31 21:20:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:20:56,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:56,783 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:56,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282 [2022-01-31 21:20:56,783 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:56,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2091692739, now seen corresponding path program 281 times [2022-01-31 21:20:56,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:56,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628532243] [2022-01-31 21:20:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:56,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:56,796 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:56,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:56,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:57,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:57,099 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:57,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628532243] [2022-01-31 21:20:57,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [628532243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:57,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:57,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:20:57,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33929448] [2022-01-31 21:20:57,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:57,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:20:57,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:57,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:20:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:20:57,100 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:57,864 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:20:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:20:57,864 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:20:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:57,864 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:20:57,864 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:20:57,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:20:57,865 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:57,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:57,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:20:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2022-01-31 21:20:58,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-01-31 21:20:58,052 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 60 [2022-01-31 21:20:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:58,052 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-01-31 21:20:58,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-01-31 21:20:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:20:58,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:58,053 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:58,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2022-01-31 21:20:58,053 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:58,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1991096899, now seen corresponding path program 282 times [2022-01-31 21:20:58,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:58,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622177796] [2022-01-31 21:20:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:58,054 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:58,054 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:58,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:58,055 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:58,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:58,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622177796] [2022-01-31 21:20:58,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [622177796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:58,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:58,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:20:58,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490055013] [2022-01-31 21:20:58,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:58,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:20:58,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:58,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:20:58,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:20:58,347 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:20:59,008 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:20:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:20:59,008 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:20:59,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:20:59,008 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:20:59,008 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:20:59,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:20:59,009 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:20:59,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:20:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:20:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 169. [2022-01-31 21:20:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-01-31 21:20:59,196 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 60 [2022-01-31 21:20:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:20:59,196 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-01-31 21:20:59,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:20:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-01-31 21:20:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:20:59,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:20:59,197 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:20:59,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2022-01-31 21:20:59,197 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:20:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:20:59,197 INFO L85 PathProgramCache]: Analyzing trace with hash -192224829, now seen corresponding path program 283 times [2022-01-31 21:20:59,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:20:59,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014925222] [2022-01-31 21:20:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:20:59,198 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:20:59,198 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:20:59,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:20:59,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:20:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:59,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:20:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:20:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:20:59,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:20:59,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014925222] [2022-01-31 21:20:59,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2014925222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:20:59,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:20:59,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:20:59,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302057847] [2022-01-31 21:20:59,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:20:59,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:20:59,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:20:59,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:20:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:20:59,494 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:00,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:00,184 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:21:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:00,184 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:00,185 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:21:00,185 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:21:00,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:00,185 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:00,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:21:00,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 171. [2022-01-31 21:21:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-01-31 21:21:00,382 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 60 [2022-01-31 21:21:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:00,382 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-01-31 21:21:00,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:00,382 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-01-31 21:21:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:00,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:00,383 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:00,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2022-01-31 21:21:00,383 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:00,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:00,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1874602307, now seen corresponding path program 284 times [2022-01-31 21:21:00,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:00,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040418723] [2022-01-31 21:21:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:00,384 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:00,384 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:00,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:00,385 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:00,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:00,627 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 21:21:00,627 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040418723] [2022-01-31 21:21:00,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040418723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:00,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:00,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:00,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765278300] [2022-01-31 21:21:00,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:00,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:00,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:00,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:00,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:00,628 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:01,435 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:21:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:01,436 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:21:01,436 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:21:01,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:01,436 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:01,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:21:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 173. [2022-01-31 21:21:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-01-31 21:21:01,637 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 60 [2022-01-31 21:21:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:01,637 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-01-31 21:21:01,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-01-31 21:21:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:01,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:01,638 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:01,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2022-01-31 21:21:01,638 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:01,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash -474378045, now seen corresponding path program 285 times [2022-01-31 21:21:01,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:01,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529108260] [2022-01-31 21:21:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:01,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:01,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:01,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:01,640 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:01,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:01,885 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 21:21:01,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:01,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529108260] [2022-01-31 21:21:01,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [529108260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:01,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:01,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:01,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496752099] [2022-01-31 21:21:01,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:01,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:01,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:01,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:01,886 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:02,702 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:21:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:02,703 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:21:02,703 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:21:02,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:02,703 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:02,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 17 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:21:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2022-01-31 21:21:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-01-31 21:21:02,906 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 60 [2022-01-31 21:21:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:02,906 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-01-31 21:21:02,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-01-31 21:21:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:02,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:02,907 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:02,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2022-01-31 21:21:02,907 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:02,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1308301379, now seen corresponding path program 286 times [2022-01-31 21:21:02,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:02,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513419530] [2022-01-31 21:21:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:02,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:02,908 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:02,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:02,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:03,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:03,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:03,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513419530] [2022-01-31 21:21:03,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1513419530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:03,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:03,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:03,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469722457] [2022-01-31 21:21:03,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:03,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:03,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:03,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:03,212 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:03,894 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:21:03,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:03,898 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:03,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:03,899 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:21:03,899 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:21:03,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:03,899 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:03,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:21:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 177. [2022-01-31 21:21:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-01-31 21:21:04,104 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 60 [2022-01-31 21:21:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:04,104 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-01-31 21:21:04,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-01-31 21:21:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:04,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:04,105 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:04,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288 [2022-01-31 21:21:04,105 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:04,105 INFO L85 PathProgramCache]: Analyzing trace with hash 771276739, now seen corresponding path program 287 times [2022-01-31 21:21:04,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:04,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116412908] [2022-01-31 21:21:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:04,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:04,106 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:04,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:04,106 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:04,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:04,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116412908] [2022-01-31 21:21:04,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116412908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:04,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:04,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:04,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076080783] [2022-01-31 21:21:04,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:04,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:04,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:04,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:04,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:04,281 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:05,004 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:21:05,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:05,004 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:05,004 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:21:05,004 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:21:05,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:05,005 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:05,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:21:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 179. [2022-01-31 21:21:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-01-31 21:21:05,215 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 60 [2022-01-31 21:21:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:05,215 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-01-31 21:21:05,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-01-31 21:21:05,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:05,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:05,216 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:05,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2022-01-31 21:21:05,216 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:05,216 INFO L85 PathProgramCache]: Analyzing trace with hash 86673219, now seen corresponding path program 288 times [2022-01-31 21:21:05,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:05,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56151124] [2022-01-31 21:21:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:05,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:05,217 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:05,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:05,218 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:05,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:05,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:05,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56151124] [2022-01-31 21:21:05,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [56151124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:05,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:05,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:05,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097132466] [2022-01-31 21:21:05,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:05,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:05,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:05,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:05,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:05,501 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:06,350 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:21:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:06,350 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:06,351 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:21:06,351 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:21:06,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:06,351 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:06,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:21:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 181. [2022-01-31 21:21:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-01-31 21:21:06,567 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 60 [2022-01-31 21:21:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:06,567 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-01-31 21:21:06,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-01-31 21:21:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:06,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:06,568 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:06,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2022-01-31 21:21:06,568 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:06,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash -687313213, now seen corresponding path program 289 times [2022-01-31 21:21:06,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:06,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408797350] [2022-01-31 21:21:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:06,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:06,569 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:06,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:06,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:06,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:06,844 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 21:21:06,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:06,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408797350] [2022-01-31 21:21:06,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [408797350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:06,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:06,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:06,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103884924] [2022-01-31 21:21:06,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:06,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:06,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:06,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:06,845 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:07,644 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:21:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:07,645 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:21:07,645 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:21:07,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:07,645 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:07,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:21:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 183. [2022-01-31 21:21:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-01-31 21:21:07,862 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 60 [2022-01-31 21:21:07,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:07,862 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-01-31 21:21:07,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-01-31 21:21:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:07,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:07,862 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:07,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291 [2022-01-31 21:21:07,862 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1458932157, now seen corresponding path program 290 times [2022-01-31 21:21:07,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:07,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072304413] [2022-01-31 21:21:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:07,864 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:07,864 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:07,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:07,864 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:08,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:08,158 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:08,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072304413] [2022-01-31 21:21:08,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2072304413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:08,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:08,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:08,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302968538] [2022-01-31 21:21:08,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:08,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:08,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:08,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:08,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:08,159 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:08,912 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:21:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:08,912 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:08,912 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:21:08,912 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:21:08,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:08,913 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:08,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 27 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:21:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2022-01-31 21:21:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-01-31 21:21:09,135 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 60 [2022-01-31 21:21:09,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:09,136 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-01-31 21:21:09,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-01-31 21:21:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:09,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:09,136 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:09,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292 [2022-01-31 21:21:09,136 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:09,136 INFO L85 PathProgramCache]: Analyzing trace with hash 44604867, now seen corresponding path program 291 times [2022-01-31 21:21:09,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:09,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627277688] [2022-01-31 21:21:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:09,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:09,137 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:09,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:09,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:09,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:09,336 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:09,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627277688] [2022-01-31 21:21:09,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627277688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:09,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:09,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:09,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311490245] [2022-01-31 21:21:09,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:09,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:09,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:09,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:09,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:09,337 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:10,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:10,081 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:21:10,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:10,081 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:10,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:10,082 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:21:10,082 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:21:10,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:10,082 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:10,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 23 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:21:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 187. [2022-01-31 21:21:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-01-31 21:21:10,320 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 60 [2022-01-31 21:21:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:10,320 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-01-31 21:21:10,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-01-31 21:21:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:10,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:10,320 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:10,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2022-01-31 21:21:10,321 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:10,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1834673475, now seen corresponding path program 292 times [2022-01-31 21:21:10,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:10,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319254687] [2022-01-31 21:21:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:10,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:10,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:10,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:10,322 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:10,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:10,506 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:10,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319254687] [2022-01-31 21:21:10,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319254687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:10,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:10,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:10,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561164071] [2022-01-31 21:21:10,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:10,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:10,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:10,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:10,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:10,507 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:11,239 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:21:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:11,240 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:21:11,240 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:21:11,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:11,240 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:11,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:21:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 189. [2022-01-31 21:21:11,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-01-31 21:21:11,493 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 60 [2022-01-31 21:21:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:11,493 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-01-31 21:21:11,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-01-31 21:21:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:11,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:11,494 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:11,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294 [2022-01-31 21:21:11,494 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash -191279933, now seen corresponding path program 293 times [2022-01-31 21:21:11,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:11,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881454118] [2022-01-31 21:21:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:11,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:11,495 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:11,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:11,495 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:11,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:11,685 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881454118] [2022-01-31 21:21:11,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881454118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:11,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:11,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:11,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653324181] [2022-01-31 21:21:11,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:11,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:11,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:11,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:11,686 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:12,457 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:21:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:12,457 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:12,457 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:21:12,457 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:21:12,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:12,458 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:12,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:21:12,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2022-01-31 21:21:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-01-31 21:21:12,707 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 60 [2022-01-31 21:21:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:12,707 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-01-31 21:21:12,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-01-31 21:21:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:12,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:12,708 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:12,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2022-01-31 21:21:12,708 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1512319933, now seen corresponding path program 294 times [2022-01-31 21:21:12,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:12,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249263902] [2022-01-31 21:21:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:12,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:12,709 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:12,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:12,710 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:12,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:12,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:12,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249263902] [2022-01-31 21:21:12,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [249263902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:12,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:12,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:12,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415199941] [2022-01-31 21:21:12,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:12,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:12,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:12,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:12,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:12,892 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:13,642 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:21:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:13,642 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:13,643 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:21:13,643 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:21:13,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:13,643 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:13,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 27 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:21:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 193. [2022-01-31 21:21:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-01-31 21:21:13,882 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 60 [2022-01-31 21:21:13,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:13,882 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-01-31 21:21:13,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-01-31 21:21:13,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:13,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:13,882 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:13,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2022-01-31 21:21:13,882 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:13,883 INFO L85 PathProgramCache]: Analyzing trace with hash 278559683, now seen corresponding path program 295 times [2022-01-31 21:21:13,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:13,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737954413] [2022-01-31 21:21:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:13,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:13,884 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:13,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:13,884 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:14,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:14,126 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:14,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737954413] [2022-01-31 21:21:14,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [737954413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:14,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:14,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:14,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342068231] [2022-01-31 21:21:14,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:14,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:14,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:14,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:14,127 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:14,949 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:21:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:14,949 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:14,949 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:21:14,949 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:21:14,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:14,950 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:14,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 23 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:21:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 195. [2022-01-31 21:21:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-01-31 21:21:15,204 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 60 [2022-01-31 21:21:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:15,205 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-01-31 21:21:15,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:15,205 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-01-31 21:21:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:15,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:15,205 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:15,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2022-01-31 21:21:15,205 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:15,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:15,205 INFO L85 PathProgramCache]: Analyzing trace with hash -968015037, now seen corresponding path program 296 times [2022-01-31 21:21:15,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:15,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794105874] [2022-01-31 21:21:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:15,206 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:15,206 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:15,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:15,207 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:15,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:15,479 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:15,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794105874] [2022-01-31 21:21:15,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794105874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:15,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:15,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:15,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652301945] [2022-01-31 21:21:15,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:15,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:15,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:15,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:15,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:15,480 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:16,353 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:21:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:16,354 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:21:16,354 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:21:16,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:16,354 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:16,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:21:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 197. [2022-01-31 21:21:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-01-31 21:21:16,597 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 60 [2022-01-31 21:21:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:16,597 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-01-31 21:21:16,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-01-31 21:21:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:16,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:16,597 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:16,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2022-01-31 21:21:16,597 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:16,598 INFO L85 PathProgramCache]: Analyzing trace with hash -630445373, now seen corresponding path program 297 times [2022-01-31 21:21:16,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:16,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771886835] [2022-01-31 21:21:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:16,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:16,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:16,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:16,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:16,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:16,890 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:16,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771886835] [2022-01-31 21:21:16,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [771886835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:16,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:16,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:16,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101691112] [2022-01-31 21:21:16,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:16,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:16,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:16,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:16,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:16,891 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:17,803 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:21:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:17,803 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:17,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:17,804 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:21:17,804 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:21:17,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:17,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:17,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 17 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:21:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 199. [2022-01-31 21:21:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-01-31 21:21:18,048 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 60 [2022-01-31 21:21:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:18,048 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-01-31 21:21:18,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:18,048 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-01-31 21:21:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:18,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:18,049 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:18,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2022-01-31 21:21:18,049 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1651454531, now seen corresponding path program 298 times [2022-01-31 21:21:18,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:18,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331520986] [2022-01-31 21:21:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:18,050 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:18,050 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:18,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:18,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:18,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:18,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:18,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331520986] [2022-01-31 21:21:18,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [331520986] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:18,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:18,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:18,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920413633] [2022-01-31 21:21:18,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:18,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:18,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:18,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:18,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:18,343 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:19,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:19,248 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:21:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:19,249 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:19,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:19,249 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:21:19,249 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:21:19,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:19,250 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:19,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:21:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 201. [2022-01-31 21:21:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-01-31 21:21:19,498 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 60 [2022-01-31 21:21:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:19,498 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-01-31 21:21:19,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-01-31 21:21:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:21:19,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:19,498 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:19,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2022-01-31 21:21:19,498 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:19,499 INFO L85 PathProgramCache]: Analyzing trace with hash -171025981, now seen corresponding path program 299 times [2022-01-31 21:21:19,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:19,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797428115] [2022-01-31 21:21:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:19,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:19,500 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:19,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:19,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:19,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:19,738 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:19,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797428115] [2022-01-31 21:21:19,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1797428115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:19,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:19,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:21:19,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776283085] [2022-01-31 21:21:19,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:19,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:21:19,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:19,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:21:19,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:21:19,739 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:20,567 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:21:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:21:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:21:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:20,568 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:21:20,568 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:21:20,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:21:20,568 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:20,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 17 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:21:20,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 157. [2022-01-31 21:21:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-01-31 21:21:20,743 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 60 [2022-01-31 21:21:20,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:20,743 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-01-31 21:21:20,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-01-31 21:21:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:20,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:20,744 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:20,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2022-01-31 21:21:20,744 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash -115136026, now seen corresponding path program 300 times [2022-01-31 21:21:20,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:20,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071120808] [2022-01-31 21:21:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:20,745 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:20,745 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:20,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:20,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:21,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:21,020 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:21,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071120808] [2022-01-31 21:21:21,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071120808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:21,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:21,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:21,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021181833] [2022-01-31 21:21:21,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:21,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:21,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:21,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:21,021 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:21,716 INFO L93 Difference]: Finished difference Result 172 states and 249 transitions. [2022-01-31 21:21:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:21,716 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:21,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:21,717 INFO L225 Difference]: With dead ends: 172 [2022-01-31 21:21:21,717 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 21:21:21,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:21,717 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:21,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 19 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 21:21:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2022-01-31 21:21:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-01-31 21:21:21,890 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 62 [2022-01-31 21:21:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:21,890 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-01-31 21:21:21,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-01-31 21:21:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:21,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:21,891 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:21,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302 [2022-01-31 21:21:21,891 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:21,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:21,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1210085018, now seen corresponding path program 301 times [2022-01-31 21:21:21,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:21,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283715282] [2022-01-31 21:21:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:21,892 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:21,892 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:21,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:21,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:22,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:22,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:22,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283715282] [2022-01-31 21:21:22,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [283715282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:22,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:22,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:22,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498614549] [2022-01-31 21:21:22,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:22,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:22,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:22,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:22,102 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:22,679 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-01-31 21:21:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:22,679 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:22,680 INFO L225 Difference]: With dead ends: 176 [2022-01-31 21:21:22,680 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:21:22,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:22,680 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:22,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:21:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2022-01-31 21:21:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-01-31 21:21:22,869 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 62 [2022-01-31 21:21:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:22,870 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-01-31 21:21:22,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-01-31 21:21:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:22,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:22,870 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:22,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2022-01-31 21:21:22,870 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:22,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1189078810, now seen corresponding path program 302 times [2022-01-31 21:21:22,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:22,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023726006] [2022-01-31 21:21:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:22,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:22,871 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:22,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:22,872 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:23,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:23,186 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023726006] [2022-01-31 21:21:23,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1023726006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:23,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:23,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:23,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466889017] [2022-01-31 21:21:23,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:23,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:23,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:23,187 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:23,947 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:21:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:23,948 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:21:23,948 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:21:23,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:23,949 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:23,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 23 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:21:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 167. [2022-01-31 21:21:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-01-31 21:21:24,145 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 62 [2022-01-31 21:21:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:24,145 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-01-31 21:21:24,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-01-31 21:21:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:24,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:24,145 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:24,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304 [2022-01-31 21:21:24,145 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:24,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:24,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1818017894, now seen corresponding path program 303 times [2022-01-31 21:21:24,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:24,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877745961] [2022-01-31 21:21:24,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:24,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:24,147 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:24,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:24,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:24,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:24,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:24,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877745961] [2022-01-31 21:21:24,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [877745961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:24,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:24,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:24,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948603136] [2022-01-31 21:21:24,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:24,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:24,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:24,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:24,429 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:25,136 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:21:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:25,137 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:25,137 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:21:25,137 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:21:25,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:25,138 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:25,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:21:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 169. [2022-01-31 21:21:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-01-31 21:21:25,336 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 62 [2022-01-31 21:21:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:25,336 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-01-31 21:21:25,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-01-31 21:21:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:25,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:25,336 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:25,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2022-01-31 21:21:25,336 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:25,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1124960230, now seen corresponding path program 304 times [2022-01-31 21:21:25,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:25,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357773314] [2022-01-31 21:21:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:25,337 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:25,338 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:25,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:25,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:25,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:25,614 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:25,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357773314] [2022-01-31 21:21:25,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [357773314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:25,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:25,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:25,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634831452] [2022-01-31 21:21:25,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:25,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:25,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:25,615 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:26,285 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:21:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:26,286 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:21:26,286 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:21:26,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:26,286 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:26,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 27 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:21:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 171. [2022-01-31 21:21:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-01-31 21:21:26,487 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 62 [2022-01-31 21:21:26,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:26,487 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-01-31 21:21:26,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-01-31 21:21:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:26,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:26,487 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:26,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306 [2022-01-31 21:21:26,487 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:26,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:26,487 INFO L85 PathProgramCache]: Analyzing trace with hash 816476006, now seen corresponding path program 305 times [2022-01-31 21:21:26,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:26,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896786193] [2022-01-31 21:21:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:26,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:26,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:26,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:26,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:26,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:26,745 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 21:21:26,745 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:26,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896786193] [2022-01-31 21:21:26,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896786193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:26,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:26,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:26,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120599502] [2022-01-31 21:21:26,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:26,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:26,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:26,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:26,746 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:27,511 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:21:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:27,512 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:27,512 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:21:27,512 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:21:27,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:27,512 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:27,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:27,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:21:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2022-01-31 21:21:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-01-31 21:21:27,728 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 62 [2022-01-31 21:21:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:27,728 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-01-31 21:21:27,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-01-31 21:21:27,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:27,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:27,728 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:27,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307 [2022-01-31 21:21:27,728 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 715880166, now seen corresponding path program 306 times [2022-01-31 21:21:27,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:27,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114414652] [2022-01-31 21:21:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:27,730 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:27,730 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:27,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:27,730 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:27,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:27,958 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:27,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114414652] [2022-01-31 21:21:27,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114414652] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:27,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:27,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:27,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540168272] [2022-01-31 21:21:27,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:27,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:27,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:27,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:27,959 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:28,615 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:21:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:28,615 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:28,616 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:21:28,616 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:21:28,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:28,616 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:28,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:21:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 175. [2022-01-31 21:21:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-01-31 21:21:28,826 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 62 [2022-01-31 21:21:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:28,826 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-01-31 21:21:28,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-01-31 21:21:28,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:28,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:28,827 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:28,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308 [2022-01-31 21:21:28,827 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:28,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1467441562, now seen corresponding path program 307 times [2022-01-31 21:21:28,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:28,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348405983] [2022-01-31 21:21:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:28,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:28,828 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:28,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:28,828 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:29,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:29,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348405983] [2022-01-31 21:21:29,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1348405983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:29,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:29,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:29,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204074778] [2022-01-31 21:21:29,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:29,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:29,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:29,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:29,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:29,016 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:29,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:29,677 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:21:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:29,677 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:29,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:29,677 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:21:29,677 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:21:29,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:29,695 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:29,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:29,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:21:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 177. [2022-01-31 21:21:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-01-31 21:21:29,926 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 62 [2022-01-31 21:21:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:29,926 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-01-31 21:21:29,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-01-31 21:21:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:29,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:29,926 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:29,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309 [2022-01-31 21:21:29,927 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash 599385574, now seen corresponding path program 308 times [2022-01-31 21:21:29,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:29,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372109566] [2022-01-31 21:21:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:29,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:29,928 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:29,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:29,929 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:30,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:30,130 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:30,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372109566] [2022-01-31 21:21:30,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [372109566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:30,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:30,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:30,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888933478] [2022-01-31 21:21:30,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:30,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:30,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:30,131 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:30,801 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:21:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:30,802 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:30,802 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:21:30,802 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:21:30,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:30,803 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:30,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:21:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 179. [2022-01-31 21:21:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-01-31 21:21:31,026 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 62 [2022-01-31 21:21:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:31,026 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-01-31 21:21:31,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-01-31 21:21:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:31,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:31,027 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:31,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2022-01-31 21:21:31,027 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:31,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1749594778, now seen corresponding path program 309 times [2022-01-31 21:21:31,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:31,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243803225] [2022-01-31 21:21:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:31,028 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:31,028 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:31,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:31,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:31,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:31,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:31,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243803225] [2022-01-31 21:21:31,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [243803225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:31,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:31,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:31,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31257738] [2022-01-31 21:21:31,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:31,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:31,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:31,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:31,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:31,215 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:31,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:31,913 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:21:31,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:31,913 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:31,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:31,913 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:21:31,913 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:21:31,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:31,914 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:31,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:21:32,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 181. [2022-01-31 21:21:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-01-31 21:21:32,136 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 62 [2022-01-31 21:21:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:32,136 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-01-31 21:21:32,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-01-31 21:21:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:32,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:32,137 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:32,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311 [2022-01-31 21:21:32,137 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:32,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash 33084646, now seen corresponding path program 310 times [2022-01-31 21:21:32,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:32,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997235975] [2022-01-31 21:21:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:32,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:32,138 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:32,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:32,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:32,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:32,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:32,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997235975] [2022-01-31 21:21:32,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1997235975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:32,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:32,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:32,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116567068] [2022-01-31 21:21:32,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:32,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:32,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:32,328 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:33,076 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:21:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:33,077 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:33,077 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:21:33,077 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:21:33,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:33,078 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:33,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:21:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 183. [2022-01-31 21:21:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-01-31 21:21:33,308 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 62 [2022-01-31 21:21:33,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:33,308 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-01-31 21:21:33,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-01-31 21:21:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:33,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:33,308 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:33,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312 [2022-01-31 21:21:33,308 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash -503939994, now seen corresponding path program 311 times [2022-01-31 21:21:33,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:33,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676511422] [2022-01-31 21:21:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:33,309 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:33,309 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:33,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:33,310 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:33,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:33,640 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:33,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676511422] [2022-01-31 21:21:33,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [676511422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:33,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:33,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:33,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771715633] [2022-01-31 21:21:33,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:33,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:33,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:33,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:33,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:33,641 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:34,425 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:21:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:34,425 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:34,425 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:21:34,425 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:21:34,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:34,426 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:34,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:21:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 185. [2022-01-31 21:21:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-01-31 21:21:34,659 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 62 [2022-01-31 21:21:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:34,659 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-01-31 21:21:34,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:34,659 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-01-31 21:21:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:34,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:34,660 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:34,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2022-01-31 21:21:34,660 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1188543514, now seen corresponding path program 312 times [2022-01-31 21:21:34,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:34,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141092516] [2022-01-31 21:21:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:34,661 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:34,661 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:34,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:34,661 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:34,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:34,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:34,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141092516] [2022-01-31 21:21:34,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [141092516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:34,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:34,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:34,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577144136] [2022-01-31 21:21:34,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:34,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:34,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:34,989 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:35,760 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:21:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:35,760 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:35,760 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:21:35,760 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:21:35,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:35,761 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:35,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:21:36,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 187. [2022-01-31 21:21:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-01-31 21:21:36,013 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 62 [2022-01-31 21:21:36,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:36,013 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-01-31 21:21:36,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:36,013 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-01-31 21:21:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:36,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:36,014 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:36,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314 [2022-01-31 21:21:36,014 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1962529946, now seen corresponding path program 313 times [2022-01-31 21:21:36,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:36,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979818162] [2022-01-31 21:21:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:36,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:36,015 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:36,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:36,016 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:36,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:36,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979818162] [2022-01-31 21:21:36,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1979818162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:36,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:36,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:36,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008237055] [2022-01-31 21:21:36,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:36,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:36,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:36,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:36,273 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:37,119 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:21:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:37,119 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:21:37,119 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:21:37,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:37,120 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:37,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 23 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:21:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 189. [2022-01-31 21:21:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-01-31 21:21:37,362 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 62 [2022-01-31 21:21:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:37,362 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-01-31 21:21:37,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-01-31 21:21:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:37,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:37,363 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:37,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315 [2022-01-31 21:21:37,363 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1560818406, now seen corresponding path program 314 times [2022-01-31 21:21:37,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:37,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906506260] [2022-01-31 21:21:37,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:37,364 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:37,364 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:37,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:37,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:37,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:37,639 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:37,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906506260] [2022-01-31 21:21:37,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1906506260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:37,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:37,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:37,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994591206] [2022-01-31 21:21:37,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:37,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:37,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:37,640 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:38,504 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:21:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:38,504 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:38,505 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:21:38,505 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:21:38,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:38,505 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:38,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:38,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:21:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 191. [2022-01-31 21:21:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-01-31 21:21:38,764 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 62 [2022-01-31 21:21:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:38,764 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-01-31 21:21:38,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:38,765 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-01-31 21:21:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:38,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:38,765 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:38,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316 [2022-01-31 21:21:38,765 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:38,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1230611866, now seen corresponding path program 315 times [2022-01-31 21:21:38,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:38,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587575539] [2022-01-31 21:21:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:38,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:38,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:38,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:38,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:39,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:39,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:39,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587575539] [2022-01-31 21:21:39,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587575539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:39,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:39,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:39,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932585179] [2022-01-31 21:21:39,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:39,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:39,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:39,039 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:39,927 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:21:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:39,928 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:39,928 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:21:39,928 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:21:39,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:39,928 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:39,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:21:40,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 193. [2022-01-31 21:21:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-01-31 21:21:40,194 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 62 [2022-01-31 21:21:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:40,194 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-01-31 21:21:40,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-01-31 21:21:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:40,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:40,195 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:40,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317 [2022-01-31 21:21:40,195 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:40,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:40,195 INFO L85 PathProgramCache]: Analyzing trace with hash 559456742, now seen corresponding path program 316 times [2022-01-31 21:21:40,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:40,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712029146] [2022-01-31 21:21:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:40,196 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:40,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:40,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:40,196 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:40,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:40,506 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:40,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712029146] [2022-01-31 21:21:40,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [712029146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:40,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:40,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:40,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394745347] [2022-01-31 21:21:40,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:40,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:40,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:40,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:40,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:40,507 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:41,444 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:21:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:41,444 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:41,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:41,444 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:21:41,445 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:21:41,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:41,445 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:41,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:21:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 195. [2022-01-31 21:21:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-01-31 21:21:41,701 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 62 [2022-01-31 21:21:41,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:41,701 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-01-31 21:21:41,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-01-31 21:21:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:41,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:41,701 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:41,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318 [2022-01-31 21:21:41,701 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:41,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1466496666, now seen corresponding path program 317 times [2022-01-31 21:21:41,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:41,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530386800] [2022-01-31 21:21:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:41,703 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:41,703 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:41,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:41,703 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:41,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:41,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530386800] [2022-01-31 21:21:41,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530386800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:41,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:41,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:41,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17902020] [2022-01-31 21:21:41,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:41,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:41,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:41,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:41,978 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:42,945 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:21:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:42,946 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:42,946 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:21:42,946 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:21:42,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:42,946 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:42,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:21:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 197. [2022-01-31 21:21:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-01-31 21:21:43,215 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 62 [2022-01-31 21:21:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:43,215 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-01-31 21:21:43,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-01-31 21:21:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:43,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:43,215 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:43,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319 [2022-01-31 21:21:43,215 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:43,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:43,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1507430630, now seen corresponding path program 318 times [2022-01-31 21:21:43,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:43,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321220618] [2022-01-31 21:21:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:43,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:43,217 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:43,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:43,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:43,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:43,524 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:43,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321220618] [2022-01-31 21:21:43,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1321220618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:43,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:43,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:43,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916268340] [2022-01-31 21:21:43,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:43,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:43,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:43,525 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:44,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:44,509 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:21:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:44,509 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:44,510 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:21:44,510 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:21:44,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:44,510 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:44,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 23 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:21:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 199. [2022-01-31 21:21:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-01-31 21:21:44,776 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 62 [2022-01-31 21:21:44,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:44,777 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-01-31 21:21:44,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-01-31 21:21:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:44,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:44,777 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:44,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320 [2022-01-31 21:21:44,777 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:44,777 INFO L85 PathProgramCache]: Analyzing trace with hash -996657050, now seen corresponding path program 319 times [2022-01-31 21:21:44,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:44,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394392890] [2022-01-31 21:21:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:44,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:44,778 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:44,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:44,779 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:45,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:45,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:45,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394392890] [2022-01-31 21:21:45,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394392890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:45,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:45,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:45,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134850001] [2022-01-31 21:21:45,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:45,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:45,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:45,089 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:46,027 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:21:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:46,027 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:21:46,027 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:21:46,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:46,028 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:46,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:21:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 201. [2022-01-31 21:21:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-01-31 21:21:46,297 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 62 [2022-01-31 21:21:46,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:46,297 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-01-31 21:21:46,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-01-31 21:21:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:46,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:46,297 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:46,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321 [2022-01-31 21:21:46,297 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:46,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2051735526, now seen corresponding path program 320 times [2022-01-31 21:21:46,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:46,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610157457] [2022-01-31 21:21:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:46,299 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:46,299 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:46,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:46,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:46,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:46,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:46,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610157457] [2022-01-31 21:21:46,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [610157457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:46,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:46,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:46,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236839646] [2022-01-31 21:21:46,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:46,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:46,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:46,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:46,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:46,485 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:47,302 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:21:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:47,302 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:47,302 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:21:47,302 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:21:47,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:47,303 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:47,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:21:47,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 203. [2022-01-31 21:21:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-01-31 21:21:47,575 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 62 [2022-01-31 21:21:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:47,575 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-01-31 21:21:47,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-01-31 21:21:47,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:47,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:47,575 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:47,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322 [2022-01-31 21:21:47,576 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:47,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1905662106, now seen corresponding path program 321 times [2022-01-31 21:21:47,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:47,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903617512] [2022-01-31 21:21:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:47,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:47,577 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:47,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:47,577 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:47,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:47,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:47,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903617512] [2022-01-31 21:21:47,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1903617512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:47,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:47,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:47,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384146366] [2022-01-31 21:21:47,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:47,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:47,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:47,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:47,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:47,764 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:48,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:48,665 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:21:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:48,666 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:48,666 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:21:48,666 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:21:48,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:48,666 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:48,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:21:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 205. [2022-01-31 21:21:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-01-31 21:21:48,944 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 62 [2022-01-31 21:21:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:48,944 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-01-31 21:21:48,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-01-31 21:21:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:48,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:48,944 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:48,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323 [2022-01-31 21:21:48,945 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:48,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash 376237798, now seen corresponding path program 322 times [2022-01-31 21:21:48,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:48,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985682700] [2022-01-31 21:21:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:48,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:48,946 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:48,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:48,946 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:49,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:49,200 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:49,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985682700] [2022-01-31 21:21:49,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [985682700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:49,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:49,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:49,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432039825] [2022-01-31 21:21:49,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:49,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:49,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:49,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:49,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:49,201 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:50,128 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-01-31 21:21:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:50,129 INFO L225 Difference]: With dead ends: 302 [2022-01-31 21:21:50,129 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:21:50,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:50,129 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:50,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:50,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:21:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 207. [2022-01-31 21:21:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-01-31 21:21:50,405 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 62 [2022-01-31 21:21:50,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:50,405 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-01-31 21:21:50,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-01-31 21:21:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:50,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:50,406 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:50,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324 [2022-01-31 21:21:50,406 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:50,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:50,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1446242714, now seen corresponding path program 323 times [2022-01-31 21:21:50,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:50,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081231970] [2022-01-31 21:21:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:50,407 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:50,407 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:50,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:50,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:50,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:50,722 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:50,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081231970] [2022-01-31 21:21:50,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081231970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:50,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:50,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:50,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924403852] [2022-01-31 21:21:50,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:50,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:50,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:50,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:50,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:50,723 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:51,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:51,662 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-01-31 21:21:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:51,663 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:51,663 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:21:51,663 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:21:51,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:51,664 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:51,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:21:51,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 209. [2022-01-31 21:21:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-01-31 21:21:51,944 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 62 [2022-01-31 21:21:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:51,944 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-01-31 21:21:51,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-01-31 21:21:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:21:51,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:51,945 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:51,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325 [2022-01-31 21:21:51,945 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:51,945 INFO L85 PathProgramCache]: Analyzing trace with hash -503357978, now seen corresponding path program 324 times [2022-01-31 21:21:51,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:51,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168801489] [2022-01-31 21:21:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:51,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:51,946 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:51,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:51,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:52,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:52,251 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:52,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168801489] [2022-01-31 21:21:52,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168801489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:52,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:52,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:21:52,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549841782] [2022-01-31 21:21:52,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:52,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:21:52,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:52,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:21:52,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:21:52,252 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:53,067 INFO L93 Difference]: Finished difference Result 264 states and 386 transitions. [2022-01-31 21:21:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:21:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:21:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:53,067 INFO L225 Difference]: With dead ends: 264 [2022-01-31 21:21:53,067 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 21:21:53,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:21:53,068 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:53,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 21:21:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2022-01-31 21:21:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-01-31 21:21:53,263 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 62 [2022-01-31 21:21:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:53,263 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-01-31 21:21:53,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-01-31 21:21:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:21:53,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:53,264 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:53,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326 [2022-01-31 21:21:53,264 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:53,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1532737079, now seen corresponding path program 325 times [2022-01-31 21:21:53,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:53,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280246691] [2022-01-31 21:21:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:53,265 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:53,265 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:53,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:53,265 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:53,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:53,486 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280246691] [2022-01-31 21:21:53,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [280246691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:53,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:53,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:21:53,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475947660] [2022-01-31 21:21:53,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:53,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:21:53,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:21:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:21:53,487 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:54,111 INFO L93 Difference]: Finished difference Result 178 states and 258 transitions. [2022-01-31 21:21:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:21:54,111 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:21:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:54,112 INFO L225 Difference]: With dead ends: 178 [2022-01-31 21:21:54,112 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 21:21:54,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:21:54,112 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:54,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 17 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 21:21:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2022-01-31 21:21:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-01-31 21:21:54,305 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 64 [2022-01-31 21:21:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:54,305 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-01-31 21:21:54,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-01-31 21:21:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:21:54,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:54,306 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:54,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327 [2022-01-31 21:21:54,306 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:54,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:54,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1667281225, now seen corresponding path program 326 times [2022-01-31 21:21:54,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:54,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363200053] [2022-01-31 21:21:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:54,307 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:54,307 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:54,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:54,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:54,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:54,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:54,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363200053] [2022-01-31 21:21:54,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363200053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:54,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:54,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:21:54,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073484516] [2022-01-31 21:21:54,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:54,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:21:54,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:21:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:21:54,502 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:55,122 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-01-31 21:21:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:21:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:21:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:55,123 INFO L225 Difference]: With dead ends: 182 [2022-01-31 21:21:55,123 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:21:55,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:21:55,123 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:55,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:21:55,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2022-01-31 21:21:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-01-31 21:21:55,342 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 64 [2022-01-31 21:21:55,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:55,342 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-01-31 21:21:55,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-01-31 21:21:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:21:55,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:55,342 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:55,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328 [2022-01-31 21:21:55,342 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1688287433, now seen corresponding path program 327 times [2022-01-31 21:21:55,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:55,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025460558] [2022-01-31 21:21:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:55,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:55,344 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:55,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:55,344 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:55,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:55,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:55,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025460558] [2022-01-31 21:21:55,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025460558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:55,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:55,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:21:55,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049926986] [2022-01-31 21:21:55,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:55,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:21:55,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:21:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:21:55,543 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:56,205 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:21:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:21:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:21:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:56,205 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:21:56,206 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:21:56,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:21:56,206 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:56,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:21:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2022-01-31 21:21:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-01-31 21:21:56,414 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 64 [2022-01-31 21:21:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:56,414 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-01-31 21:21:56,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-01-31 21:21:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:21:56,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:56,414 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:56,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329 [2022-01-31 21:21:56,414 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:56,415 INFO L85 PathProgramCache]: Analyzing trace with hash 400416841, now seen corresponding path program 328 times [2022-01-31 21:21:56,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:56,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797977477] [2022-01-31 21:21:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:56,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:56,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:56,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:56,416 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:56,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:56,691 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 21:21:56,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:56,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797977477] [2022-01-31 21:21:56,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [797977477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:56,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:56,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:21:56,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891542762] [2022-01-31 21:21:56,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:56,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:21:56,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:56,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:21:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:21:56,692 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:57,487 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:21:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:21:57,487 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:21:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:57,488 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:21:57,488 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:21:57,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:21:57,488 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:57,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:21:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 175. [2022-01-31 21:21:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-01-31 21:21:57,702 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 64 [2022-01-31 21:21:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:57,702 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-01-31 21:21:57,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-01-31 21:21:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:21:57,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:57,702 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:57,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330 [2022-01-31 21:21:57,702 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash -292640823, now seen corresponding path program 329 times [2022-01-31 21:21:57,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:57,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253011787] [2022-01-31 21:21:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:57,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:57,704 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:57,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:57,704 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:58,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:21:58,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:58,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253011787] [2022-01-31 21:21:58,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253011787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:58,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:58,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:21:58,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299270130] [2022-01-31 21:21:58,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:58,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:21:58,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:21:58,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:21:58,037 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:21:58,861 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:21:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:21:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:21:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:21:58,862 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:21:58,862 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:21:58,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:21:58,862 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:21:58,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:21:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:21:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2022-01-31 21:21:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-01-31 21:21:59,083 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 64 [2022-01-31 21:21:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:21:59,083 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-01-31 21:21:59,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:21:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-01-31 21:21:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:21:59,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:21:59,084 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:21:59,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331 [2022-01-31 21:21:59,084 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:21:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:21:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash -601125047, now seen corresponding path program 330 times [2022-01-31 21:21:59,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:21:59,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188496429] [2022-01-31 21:21:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:21:59,085 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:21:59,085 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:21:59,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:21:59,085 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:21:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:59,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:21:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:21:59,412 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 21:21:59,412 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:21:59,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188496429] [2022-01-31 21:21:59,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [188496429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:21:59,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:21:59,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:21:59,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134095308] [2022-01-31 21:21:59,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:21:59,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:21:59,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:21:59,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:21:59,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:21:59,413 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:00,316 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:22:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:00,317 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:00,317 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:22:00,317 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:22:00,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:00,318 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:00,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:00,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:22:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 179. [2022-01-31 21:22:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-01-31 21:22:00,544 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 64 [2022-01-31 21:22:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:00,545 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-01-31 21:22:00,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-01-31 21:22:00,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:00,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:00,545 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:00,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332 [2022-01-31 21:22:00,545 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash -701720887, now seen corresponding path program 331 times [2022-01-31 21:22:00,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:00,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014380966] [2022-01-31 21:22:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:00,546 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:00,546 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:00,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:00,547 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:00,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:00,874 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:00,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014380966] [2022-01-31 21:22:00,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014380966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:00,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:00,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:00,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528225483] [2022-01-31 21:22:00,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:00,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:00,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:00,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:00,875 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:01,639 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:22:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:01,640 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:01,640 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:22:01,640 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:22:01,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:01,640 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:01,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:22:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 181. [2022-01-31 21:22:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-01-31 21:22:01,904 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 64 [2022-01-31 21:22:01,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:01,904 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-01-31 21:22:01,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-01-31 21:22:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:01,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:01,905 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:01,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2022-01-31 21:22:01,905 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:01,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1409924681, now seen corresponding path program 332 times [2022-01-31 21:22:01,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:01,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649002689] [2022-01-31 21:22:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:01,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:01,906 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:01,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:01,907 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:02,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:02,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:02,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649002689] [2022-01-31 21:22:02,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [649002689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:02,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:02,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:02,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806425861] [2022-01-31 21:22:02,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:02,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:02,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:02,111 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:02,809 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:22:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:02,810 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:02,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:02,810 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:22:02,810 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:22:02,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:02,811 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:02,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:22:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 183. [2022-01-31 21:22:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-01-31 21:22:03,064 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 64 [2022-01-31 21:22:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:03,065 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-01-31 21:22:03,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-01-31 21:22:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:03,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:03,065 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:03,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334 [2022-01-31 21:22:03,065 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash -818215479, now seen corresponding path program 333 times [2022-01-31 21:22:03,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785160021] [2022-01-31 21:22:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:03,067 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:03,067 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:03,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:03,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:03,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:03,288 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785160021] [2022-01-31 21:22:03,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [785160021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:03,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:03,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:03,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392719247] [2022-01-31 21:22:03,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:03,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:03,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:03,289 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:04,058 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:22:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:04,058 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:04,059 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:22:04,059 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:22:04,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:04,059 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:04,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:04,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:22:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 185. [2022-01-31 21:22:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-01-31 21:22:04,296 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 64 [2022-01-31 21:22:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:04,296 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-01-31 21:22:04,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-01-31 21:22:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:04,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:04,296 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:04,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335 [2022-01-31 21:22:04,297 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1127771465, now seen corresponding path program 334 times [2022-01-31 21:22:04,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:04,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276188493] [2022-01-31 21:22:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:04,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:04,298 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:04,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:04,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:04,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:04,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:04,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276188493] [2022-01-31 21:22:04,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [276188493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:04,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:04,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:04,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295870307] [2022-01-31 21:22:04,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:04,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:04,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:04,496 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:05,229 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:22:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:05,229 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:22:05,229 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:22:05,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:05,230 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:05,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:22:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 187. [2022-01-31 21:22:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-01-31 21:22:05,478 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 64 [2022-01-31 21:22:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:05,478 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-01-31 21:22:05,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:05,478 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-01-31 21:22:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:05,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:05,479 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:05,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336 [2022-01-31 21:22:05,479 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:05,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:05,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1384516407, now seen corresponding path program 335 times [2022-01-31 21:22:05,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:05,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625659781] [2022-01-31 21:22:05,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:05,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:05,480 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:05,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:05,481 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:05,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:05,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:05,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625659781] [2022-01-31 21:22:05,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625659781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:05,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:05,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:05,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335522202] [2022-01-31 21:22:05,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:05,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:05,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:05,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:05,810 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:06,690 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:22:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:06,690 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:06,690 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:22:06,690 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:22:06,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:06,691 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:06,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:22:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 189. [2022-01-31 21:22:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-01-31 21:22:06,946 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 64 [2022-01-31 21:22:06,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:06,946 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-01-31 21:22:06,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-01-31 21:22:06,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:06,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:06,947 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:06,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337 [2022-01-31 21:22:06,947 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:06,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1921541047, now seen corresponding path program 336 times [2022-01-31 21:22:06,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:06,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366178014] [2022-01-31 21:22:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:06,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:06,948 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:06,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:06,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:07,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:07,224 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366178014] [2022-01-31 21:22:07,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [366178014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:07,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:07,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:07,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152039829] [2022-01-31 21:22:07,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:07,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:07,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:07,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:07,225 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:08,206 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:22:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:08,206 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:08,206 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:22:08,206 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:22:08,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:08,207 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:08,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:22:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 191. [2022-01-31 21:22:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-01-31 21:22:08,468 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 64 [2022-01-31 21:22:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:08,468 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-01-31 21:22:08,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-01-31 21:22:08,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:08,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:08,468 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:08,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338 [2022-01-31 21:22:08,468 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1688822729, now seen corresponding path program 337 times [2022-01-31 21:22:08,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:08,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679532790] [2022-01-31 21:22:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:08,469 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:08,470 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:08,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:08,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:08,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:08,820 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679532790] [2022-01-31 21:22:08,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1679532790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:08,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:08,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:08,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207129101] [2022-01-31 21:22:08,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:08,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:08,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:08,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:08,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:08,821 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:09,807 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:22:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:09,807 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:09,808 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:22:09,808 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:22:09,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:09,808 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:09,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:22:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 193. [2022-01-31 21:22:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-01-31 21:22:10,080 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 64 [2022-01-31 21:22:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:10,080 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-01-31 21:22:10,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-01-31 21:22:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:10,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:10,081 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:10,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339 [2022-01-31 21:22:10,081 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:10,081 INFO L85 PathProgramCache]: Analyzing trace with hash 914836297, now seen corresponding path program 338 times [2022-01-31 21:22:10,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:10,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436996418] [2022-01-31 21:22:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:10,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:10,082 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:10,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:10,083 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:10,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:10,412 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 21:22:10,412 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:10,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436996418] [2022-01-31 21:22:10,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [436996418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:10,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:10,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:10,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049535065] [2022-01-31 21:22:10,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:10,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:10,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:10,413 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:11,313 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:22:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:11,313 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:11,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:11,314 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:22:11,314 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:22:11,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:11,314 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:11,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 17 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:22:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 195. [2022-01-31 21:22:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-01-31 21:22:11,592 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 64 [2022-01-31 21:22:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:11,592 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-01-31 21:22:11,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-01-31 21:22:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:11,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:11,592 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:11,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340 [2022-01-31 21:22:11,592 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash 143217353, now seen corresponding path program 339 times [2022-01-31 21:22:11,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:11,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649803849] [2022-01-31 21:22:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:11,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:11,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:11,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:11,594 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:11,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:11,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:11,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649803849] [2022-01-31 21:22:11,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649803849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:11,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:11,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:11,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569732423] [2022-01-31 21:22:11,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:11,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:11,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:11,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:11,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:11,826 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:12,639 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:22:12,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:12,640 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:12,640 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:22:12,640 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:22:12,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:12,641 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:12,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 27 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:22:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 197. [2022-01-31 21:22:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-01-31 21:22:12,909 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 64 [2022-01-31 21:22:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:12,909 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-01-31 21:22:12,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-01-31 21:22:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:12,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:12,910 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:12,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341 [2022-01-31 21:22:12,910 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:12,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1646754377, now seen corresponding path program 340 times [2022-01-31 21:22:12,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:12,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540941415] [2022-01-31 21:22:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:12,911 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:12,911 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:12,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:12,911 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:13,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:13,129 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:13,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540941415] [2022-01-31 21:22:13,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [540941415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:13,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:13,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:13,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490207516] [2022-01-31 21:22:13,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:13,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:13,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:13,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:13,130 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:13,956 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:22:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:13,957 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:13,957 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:22:13,957 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:22:13,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:13,958 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:13,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 15 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:22:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 199. [2022-01-31 21:22:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-01-31 21:22:14,238 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 64 [2022-01-31 21:22:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:14,238 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-01-31 21:22:14,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:14,238 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-01-31 21:22:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:14,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:14,239 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:14,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342 [2022-01-31 21:22:14,239 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash -858144311, now seen corresponding path program 341 times [2022-01-31 21:22:14,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:14,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378438815] [2022-01-31 21:22:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:14,241 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:14,241 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:14,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:14,242 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:14,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:14,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378438815] [2022-01-31 21:22:14,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1378438815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:14,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:14,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:14,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360829963] [2022-01-31 21:22:14,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:14,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:14,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:14,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:14,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:14,438 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:15,285 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:22:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:15,286 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:15,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:15,286 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:22:15,286 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:22:15,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:15,287 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:15,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 17 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:22:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 201. [2022-01-31 21:22:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-01-31 21:22:15,570 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 64 [2022-01-31 21:22:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:15,570 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-01-31 21:22:15,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-01-31 21:22:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:15,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:15,570 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:15,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343 [2022-01-31 21:22:15,570 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:15,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1410869577, now seen corresponding path program 342 times [2022-01-31 21:22:15,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:15,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719361573] [2022-01-31 21:22:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:15,572 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:15,572 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:15,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:15,572 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:15,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:15,765 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 21:22:15,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:15,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719361573] [2022-01-31 21:22:15,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1719361573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:15,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:15,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:15,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454786844] [2022-01-31 21:22:15,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:15,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:15,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:15,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:15,766 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:16,617 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:22:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:16,617 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:16,617 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:22:16,617 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:22:16,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:16,618 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:16,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 27 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:16,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:22:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 203. [2022-01-31 21:22:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-01-31 21:22:16,911 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 64 [2022-01-31 21:22:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:16,911 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-01-31 21:22:16,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-01-31 21:22:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:16,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:16,911 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:16,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2022-01-31 21:22:16,911 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash 89829577, now seen corresponding path program 343 times [2022-01-31 21:22:16,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:16,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930586892] [2022-01-31 21:22:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:16,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:16,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:16,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:16,913 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:17,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:17,103 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:17,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930586892] [2022-01-31 21:22:17,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1930586892] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:17,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:17,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:17,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144239594] [2022-01-31 21:22:17,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:17,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:17,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:17,104 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:17,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:17,941 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:22:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:17,942 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:17,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:17,942 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:22:17,942 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:22:17,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:17,942 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:17,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 17 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:17,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:22:18,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 205. [2022-01-31 21:22:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-01-31 21:22:18,241 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 64 [2022-01-31 21:22:18,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:18,241 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-01-31 21:22:18,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-01-31 21:22:18,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:18,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:18,242 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:18,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345 [2022-01-31 21:22:18,242 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:18,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:18,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1880709193, now seen corresponding path program 344 times [2022-01-31 21:22:18,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:18,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695992167] [2022-01-31 21:22:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:18,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:18,243 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:18,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:18,244 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:18,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:18,446 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 21:22:18,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:18,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695992167] [2022-01-31 21:22:18,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [695992167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:18,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:18,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:18,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557820429] [2022-01-31 21:22:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:18,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:18,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:18,447 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:19,378 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:22:19,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:19,378 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:19,379 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:22:19,379 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:22:19,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:19,380 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:19,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:19,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:22:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 207. [2022-01-31 21:22:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-01-31 21:22:19,677 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 64 [2022-01-31 21:22:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:19,677 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-01-31 21:22:19,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-01-31 21:22:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:19,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:19,677 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:19,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346 [2022-01-31 21:22:19,677 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:19,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash 634134473, now seen corresponding path program 345 times [2022-01-31 21:22:19,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:19,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173261143] [2022-01-31 21:22:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:19,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:19,679 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:19,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:19,679 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:19,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:19,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:19,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173261143] [2022-01-31 21:22:19,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173261143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:19,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:19,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:19,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829810889] [2022-01-31 21:22:19,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:19,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:19,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:19,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:19,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:19,953 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:21,057 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:22:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:21,057 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:21,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:21,058 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:22:21,058 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:22:21,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:21,058 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:21,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:22:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 209. [2022-01-31 21:22:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-01-31 21:22:21,386 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 64 [2022-01-31 21:22:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:21,386 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-01-31 21:22:21,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-01-31 21:22:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:21,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:21,387 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:21,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347 [2022-01-31 21:22:21,387 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:21,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:21,387 INFO L85 PathProgramCache]: Analyzing trace with hash 971704137, now seen corresponding path program 346 times [2022-01-31 21:22:21,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:21,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246243230] [2022-01-31 21:22:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:21,388 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:21,388 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:21,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:21,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:21,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:21,713 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:21,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246243230] [2022-01-31 21:22:21,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1246243230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:21,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:21,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:21,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937371872] [2022-01-31 21:22:21,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:21,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:21,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:21,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:21,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:21,714 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:22,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:22,812 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-01-31 21:22:22,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:22,812 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:22,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:22,812 INFO L225 Difference]: With dead ends: 302 [2022-01-31 21:22:22,813 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:22:22,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:22,813 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:22,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:22:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 211. [2022-01-31 21:22:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-01-31 21:22:23,182 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 64 [2022-01-31 21:22:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:23,183 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-01-31 21:22:23,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-01-31 21:22:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:23,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:23,183 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:23,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348 [2022-01-31 21:22:23,183 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1041363255, now seen corresponding path program 347 times [2022-01-31 21:22:23,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:23,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810776763] [2022-01-31 21:22:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:23,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:23,185 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:23,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:23,186 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:23,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:23,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:23,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810776763] [2022-01-31 21:22:23,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1810776763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:23,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:23,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:23,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132349132] [2022-01-31 21:22:23,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:23,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:23,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:23,514 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:24,632 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-01-31 21:22:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:24,633 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:22:24,633 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:22:24,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:24,633 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:24,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:24,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:22:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 213. [2022-01-31 21:22:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-01-31 21:22:24,940 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 64 [2022-01-31 21:22:24,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:24,941 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-01-31 21:22:24,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-01-31 21:22:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:24,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:24,941 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:24,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349 [2022-01-31 21:22:24,941 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:24,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1431123529, now seen corresponding path program 348 times [2022-01-31 21:22:24,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:24,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539178985] [2022-01-31 21:22:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:24,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:24,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:24,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:24,943 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:25,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:25,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:25,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539178985] [2022-01-31 21:22:25,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1539178985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:25,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:25,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:25,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143764839] [2022-01-31 21:22:25,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:25,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:25,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:25,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:25,276 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:26,351 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-01-31 21:22:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:26,352 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:22:26,352 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:22:26,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:26,352 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:26,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:26,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:22:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 215. [2022-01-31 21:22:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-01-31 21:22:26,721 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 64 [2022-01-31 21:22:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:26,721 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-01-31 21:22:26,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-01-31 21:22:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:26,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:26,722 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:26,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350 [2022-01-31 21:22:26,722 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:26,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1920959031, now seen corresponding path program 349 times [2022-01-31 21:22:26,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:26,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132565651] [2022-01-31 21:22:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:26,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:26,724 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:26,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:26,725 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:26,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:26,936 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:26,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132565651] [2022-01-31 21:22:26,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [132565651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:26,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:26,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:26,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355601154] [2022-01-31 21:22:26,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:26,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:26,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:26,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:26,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:26,937 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:27,956 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-01-31 21:22:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:27,956 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:27,956 INFO L225 Difference]: With dead ends: 320 [2022-01-31 21:22:27,956 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:22:27,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:27,957 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:27,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:22:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 217. [2022-01-31 21:22:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-01-31 21:22:28,318 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 64 [2022-01-31 21:22:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:28,318 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-01-31 21:22:28,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-01-31 21:22:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:22:28,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:28,323 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:28,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351 [2022-01-31 21:22:28,323 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2046827191, now seen corresponding path program 350 times [2022-01-31 21:22:28,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:28,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42757978] [2022-01-31 21:22:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:28,324 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:28,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:28,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:28,325 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:28,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:28,646 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:28,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42757978] [2022-01-31 21:22:28,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [42757978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:28,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:28,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:22:28,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511450162] [2022-01-31 21:22:28,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:28,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:22:28,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:22:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:22:28,647 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:29,719 INFO L93 Difference]: Finished difference Result 274 states and 401 transitions. [2022-01-31 21:22:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:22:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:22:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:29,720 INFO L225 Difference]: With dead ends: 274 [2022-01-31 21:22:29,720 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 21:22:29,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:22:29,721 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:29,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 21:22:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 169. [2022-01-31 21:22:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:29,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-01-31 21:22:29,943 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 64 [2022-01-31 21:22:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:29,943 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-01-31 21:22:29,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-01-31 21:22:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:29,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:29,944 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:29,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352 [2022-01-31 21:22:29,944 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1952251116, now seen corresponding path program 351 times [2022-01-31 21:22:29,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:29,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177410377] [2022-01-31 21:22:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:29,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:29,945 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:29,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:29,946 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:30,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:30,314 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:30,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177410377] [2022-01-31 21:22:30,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [177410377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:30,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:30,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:30,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200872726] [2022-01-31 21:22:30,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:30,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:30,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:30,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:30,318 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:31,279 INFO L93 Difference]: Finished difference Result 184 states and 267 transitions. [2022-01-31 21:22:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:31,279 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:31,280 INFO L225 Difference]: With dead ends: 184 [2022-01-31 21:22:31,280 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 21:22:31,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:31,281 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:31,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 19 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:22:31,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 21:22:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2022-01-31 21:22:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-01-31 21:22:31,507 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 66 [2022-01-31 21:22:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:31,507 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-01-31 21:22:31,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-01-31 21:22:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:31,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:31,508 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:31,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353 [2022-01-31 21:22:31,508 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:31,508 INFO L85 PathProgramCache]: Analyzing trace with hash 857302124, now seen corresponding path program 352 times [2022-01-31 21:22:31,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:31,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339557830] [2022-01-31 21:22:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:31,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:31,509 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:31,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:31,510 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:31,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:31,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339557830] [2022-01-31 21:22:31,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [339557830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:31,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:31,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:31,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262572213] [2022-01-31 21:22:31,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:31,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:31,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:31,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:31,862 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:32,770 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-01-31 21:22:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:32,770 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:32,770 INFO L225 Difference]: With dead ends: 188 [2022-01-31 21:22:32,770 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 21:22:32,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:32,771 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:32,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 21:22:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2022-01-31 21:22:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-01-31 21:22:33,017 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 66 [2022-01-31 21:22:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:33,017 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-01-31 21:22:33,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-01-31 21:22:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:33,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:33,017 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:33,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354 [2022-01-31 21:22:33,017 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:33,017 INFO L85 PathProgramCache]: Analyzing trace with hash 878308332, now seen corresponding path program 353 times [2022-01-31 21:22:33,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:33,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848439955] [2022-01-31 21:22:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:33,018 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:33,018 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:33,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:33,019 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:33,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:33,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:33,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848439955] [2022-01-31 21:22:33,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848439955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:33,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:33,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:33,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147136311] [2022-01-31 21:22:33,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:33,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:33,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:33,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:33,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:33,371 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:34,111 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:22:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:34,111 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:34,111 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:22:34,111 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:22:34,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:34,112 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:34,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:22:34,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-01-31 21:22:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-01-31 21:22:34,347 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 66 [2022-01-31 21:22:34,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:34,347 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-01-31 21:22:34,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-01-31 21:22:34,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:34,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:34,347 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:34,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355 [2022-01-31 21:22:34,348 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:34,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:34,348 INFO L85 PathProgramCache]: Analyzing trace with hash -409562260, now seen corresponding path program 354 times [2022-01-31 21:22:34,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:34,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727208120] [2022-01-31 21:22:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:34,349 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:34,349 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:34,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:34,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:34,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:34,712 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727208120] [2022-01-31 21:22:34,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [727208120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:34,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:34,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:34,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643911025] [2022-01-31 21:22:34,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:34,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:34,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:34,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:34,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:34,713 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:35,490 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:22:35,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:35,490 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:35,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:35,491 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:22:35,491 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:22:35,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:35,491 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:35,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 17 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:35,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:22:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 181. [2022-01-31 21:22:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-01-31 21:22:35,736 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 66 [2022-01-31 21:22:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:35,736 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-01-31 21:22:35,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-01-31 21:22:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:35,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:35,737 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:35,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356 [2022-01-31 21:22:35,737 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:35,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1102619924, now seen corresponding path program 355 times [2022-01-31 21:22:35,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:35,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82290239] [2022-01-31 21:22:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:35,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:35,738 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:35,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:35,739 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:36,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:36,119 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:36,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82290239] [2022-01-31 21:22:36,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [82290239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:36,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:36,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:36,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227497853] [2022-01-31 21:22:36,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:36,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:36,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:36,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:36,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:36,120 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:36,948 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:22:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:36,949 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:36,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:36,949 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:22:36,949 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:22:36,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:36,949 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:36,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 27 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:22:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 183. [2022-01-31 21:22:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-01-31 21:22:37,231 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 66 [2022-01-31 21:22:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:37,232 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-01-31 21:22:37,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-01-31 21:22:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:37,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:37,232 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:37,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357 [2022-01-31 21:22:37,232 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1411104148, now seen corresponding path program 356 times [2022-01-31 21:22:37,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:37,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533256670] [2022-01-31 21:22:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:37,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:37,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:37,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:37,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:37,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:37,598 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:37,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533256670] [2022-01-31 21:22:37,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1533256670] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:37,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:37,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:37,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754847734] [2022-01-31 21:22:37,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:37,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:37,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:37,599 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:38,563 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:22:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:38,563 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:38,563 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:22:38,563 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:22:38,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:38,564 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:38,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 25 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:38,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:22:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 185. [2022-01-31 21:22:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-01-31 21:22:38,864 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 66 [2022-01-31 21:22:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:38,864 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-01-31 21:22:38,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-01-31 21:22:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:38,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:38,865 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:38,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358 [2022-01-31 21:22:38,865 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1511699988, now seen corresponding path program 357 times [2022-01-31 21:22:38,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:38,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748985564] [2022-01-31 21:22:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:38,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:38,866 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:38,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:38,867 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:39,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:39,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:39,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748985564] [2022-01-31 21:22:39,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748985564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:39,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:39,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:39,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465079394] [2022-01-31 21:22:39,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:39,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:39,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:39,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:39,202 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:40,009 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:22:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:40,010 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:22:40,010 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:22:40,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:40,011 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:40,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:22:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 187. [2022-01-31 21:22:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-01-31 21:22:40,301 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 66 [2022-01-31 21:22:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:40,302 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-01-31 21:22:40,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-01-31 21:22:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:40,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:40,302 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:40,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359 [2022-01-31 21:22:40,302 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:40,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:40,303 INFO L85 PathProgramCache]: Analyzing trace with hash 599945580, now seen corresponding path program 358 times [2022-01-31 21:22:40,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:40,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103476277] [2022-01-31 21:22:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:40,304 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:40,304 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:40,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:40,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:40,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:40,543 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103476277] [2022-01-31 21:22:40,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2103476277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:40,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:40,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:40,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196544905] [2022-01-31 21:22:40,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:40,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:40,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:40,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:40,544 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:41,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:41,417 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:22:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:41,418 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:41,418 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:22:41,418 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:22:41,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:41,418 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:41,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:22:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 189. [2022-01-31 21:22:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-01-31 21:22:41,724 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 66 [2022-01-31 21:22:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:41,724 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-01-31 21:22:41,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:41,724 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-01-31 21:22:41,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:41,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:41,724 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:41,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360 [2022-01-31 21:22:41,725 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:41,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1628194580, now seen corresponding path program 359 times [2022-01-31 21:22:41,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:41,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221389624] [2022-01-31 21:22:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:41,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:41,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:41,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:41,727 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:41,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:41,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:41,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221389624] [2022-01-31 21:22:41,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [221389624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:41,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:41,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:41,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224163937] [2022-01-31 21:22:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:41,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:41,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:41,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:41,962 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:42,825 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:22:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:42,826 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:22:42,826 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:22:42,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:42,826 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:42,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 27 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:22:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 191. [2022-01-31 21:22:43,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-01-31 21:22:43,128 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 66 [2022-01-31 21:22:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:43,128 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-01-31 21:22:43,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-01-31 21:22:43,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:43,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:43,129 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:43,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361 [2022-01-31 21:22:43,129 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash 317792364, now seen corresponding path program 360 times [2022-01-31 21:22:43,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:43,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071220093] [2022-01-31 21:22:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:43,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:43,130 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:43,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:43,131 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:43,353 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 21:22:43,356 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:43,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071220093] [2022-01-31 21:22:43,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071220093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:43,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:43,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:43,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810431700] [2022-01-31 21:22:43,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:43,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:43,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:43,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:43,357 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:44,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:44,177 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:22:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:44,177 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:44,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:44,178 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:22:44,178 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:22:44,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:44,178 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:44,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:22:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 193. [2022-01-31 21:22:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-01-31 21:22:44,486 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 66 [2022-01-31 21:22:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:44,486 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-01-31 21:22:44,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-01-31 21:22:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:44,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:44,486 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:44,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362 [2022-01-31 21:22:44,486 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2100471788, now seen corresponding path program 361 times [2022-01-31 21:22:44,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:44,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943059998] [2022-01-31 21:22:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:44,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:44,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:44,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:44,488 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:44,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:44,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:44,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943059998] [2022-01-31 21:22:44,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [943059998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:44,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:44,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:44,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154940248] [2022-01-31 21:22:44,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:44,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:44,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:44,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:44,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:44,794 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:45,874 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:22:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:45,874 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:45,875 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:22:45,875 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:22:45,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:45,875 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:45,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:22:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 195. [2022-01-31 21:22:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-01-31 21:22:46,174 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 66 [2022-01-31 21:22:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:46,174 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-01-31 21:22:46,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-01-31 21:22:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:46,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:46,174 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:46,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363 [2022-01-31 21:22:46,174 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:46,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1563447148, now seen corresponding path program 362 times [2022-01-31 21:22:46,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:46,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89906066] [2022-01-31 21:22:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:46,176 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:46,176 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:46,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:46,176 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:46,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:46,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:46,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89906066] [2022-01-31 21:22:46,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [89906066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:46,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:46,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:46,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127029749] [2022-01-31 21:22:46,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:46,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:46,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:46,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:46,548 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:47,626 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:22:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:47,626 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:47,626 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:22:47,627 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:22:47,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:47,627 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:47,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:22:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 197. [2022-01-31 21:22:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-01-31 21:22:47,962 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 66 [2022-01-31 21:22:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:47,962 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-01-31 21:22:47,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-01-31 21:22:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:47,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:47,963 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:47,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364 [2022-01-31 21:22:47,963 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash 878843628, now seen corresponding path program 363 times [2022-01-31 21:22:47,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:47,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198780868] [2022-01-31 21:22:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:47,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:47,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:47,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:47,972 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:48,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:48,333 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:48,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198780868] [2022-01-31 21:22:48,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1198780868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:48,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:48,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:48,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213615246] [2022-01-31 21:22:48,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:48,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:48,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:48,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:48,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:48,334 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:49,407 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:22:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:49,408 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:22:49,408 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:22:49,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:49,408 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:49,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 25 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:22:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 199. [2022-01-31 21:22:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-01-31 21:22:49,696 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 66 [2022-01-31 21:22:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:49,697 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-01-31 21:22:49,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-01-31 21:22:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:49,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:49,697 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:49,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365 [2022-01-31 21:22:49,697 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash 104857196, now seen corresponding path program 364 times [2022-01-31 21:22:49,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:49,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098980241] [2022-01-31 21:22:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:49,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:49,698 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:49,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:49,699 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:50,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:50,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:50,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098980241] [2022-01-31 21:22:50,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1098980241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:50,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:50,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:50,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994291943] [2022-01-31 21:22:50,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:50,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:50,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:50,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:50,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:50,049 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:51,078 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:22:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:51,078 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:51,079 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:22:51,079 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:22:51,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:51,079 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:51,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:51,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:22:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2022-01-31 21:22:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-01-31 21:22:51,407 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 66 [2022-01-31 21:22:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:51,408 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-01-31 21:22:51,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-01-31 21:22:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:51,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:51,408 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:51,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366 [2022-01-31 21:22:51,408 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:51,408 INFO L85 PathProgramCache]: Analyzing trace with hash -666761748, now seen corresponding path program 365 times [2022-01-31 21:22:51,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:51,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261298373] [2022-01-31 21:22:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:51,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:51,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:51,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:51,412 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:51,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:51,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:51,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261298373] [2022-01-31 21:22:51,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [261298373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:51,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:51,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:51,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504124972] [2022-01-31 21:22:51,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:51,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:51,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:51,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:51,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:51,782 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:52,740 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:22:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:52,740 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:52,741 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:22:52,741 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:22:52,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:52,741 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:52,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:22:53,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 203. [2022-01-31 21:22:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-01-31 21:22:53,052 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 66 [2022-01-31 21:22:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:53,052 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-01-31 21:22:53,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-01-31 21:22:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:53,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:53,053 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:53,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367 [2022-01-31 21:22:53,053 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash 836775276, now seen corresponding path program 366 times [2022-01-31 21:22:53,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:53,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095667734] [2022-01-31 21:22:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:53,054 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:53,054 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:53,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:53,055 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:53,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:53,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:53,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095667734] [2022-01-31 21:22:53,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095667734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:53,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:53,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:53,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808392646] [2022-01-31 21:22:53,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:53,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:53,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:53,285 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:54,314 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:22:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:54,314 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:54,315 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:22:54,315 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:22:54,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:54,315 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:54,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:22:54,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 205. [2022-01-31 21:22:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-01-31 21:22:54,660 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 66 [2022-01-31 21:22:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:54,661 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-01-31 21:22:54,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-01-31 21:22:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:54,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:54,661 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:54,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368 [2022-01-31 21:22:54,661 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:54,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1668123412, now seen corresponding path program 367 times [2022-01-31 21:22:54,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:54,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702528501] [2022-01-31 21:22:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:54,662 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:54,662 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:54,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:54,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:55,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:55,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:55,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702528501] [2022-01-31 21:22:55,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [702528501] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:55,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:55,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:55,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701246357] [2022-01-31 21:22:55,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:55,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:55,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:55,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:55,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:55,023 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:56,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:56,234 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:22:56,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:56,234 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:56,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:56,234 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:22:56,234 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:22:56,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:56,235 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:56,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 25 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:22:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:22:56,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 207. [2022-01-31 21:22:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-01-31 21:22:56,586 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 66 [2022-01-31 21:22:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:56,586 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-01-31 21:22:56,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-01-31 21:22:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:56,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:56,586 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:56,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369 [2022-01-31 21:22:56,586 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:56,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:56,587 INFO L85 PathProgramCache]: Analyzing trace with hash 600890476, now seen corresponding path program 368 times [2022-01-31 21:22:56,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:56,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691065034] [2022-01-31 21:22:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:56,588 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:56,588 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:56,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:56,588 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:56,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:56,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:56,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691065034] [2022-01-31 21:22:56,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691065034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:56,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:56,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:56,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490926776] [2022-01-31 21:22:56,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:56,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:56,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:56,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:56,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:56,945 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:58,069 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:22:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:58,069 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:58,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:58,069 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:22:58,069 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:22:58,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:58,070 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:58,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 17 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:22:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 209. [2022-01-31 21:22:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-01-31 21:22:58,404 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 66 [2022-01-31 21:22:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:22:58,404 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-01-31 21:22:58,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-01-31 21:22:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:22:58,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:22:58,404 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:22:58,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370 [2022-01-31 21:22:58,404 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:22:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:22:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash -720149524, now seen corresponding path program 369 times [2022-01-31 21:22:58,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:22:58,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429487191] [2022-01-31 21:22:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:22:58,406 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:22:58,406 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:22:58,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:22:58,406 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:22:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:58,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:22:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:22:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:22:58,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:22:58,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429487191] [2022-01-31 21:22:58,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [429487191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:22:58,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:22:58,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:22:58,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648932964] [2022-01-31 21:22:58,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:22:58,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:22:58,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:22:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:22:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:22:58,775 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:22:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:22:59,970 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:22:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:22:59,970 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:22:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:22:59,971 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:22:59,971 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:22:59,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:22:59,971 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:22:59,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:22:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:23:00,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 211. [2022-01-31 21:23:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:00,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-01-31 21:23:00,335 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 66 [2022-01-31 21:23:00,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:00,335 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-01-31 21:23:00,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:00,335 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-01-31 21:23:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:23:00,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:00,336 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:00,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371 [2022-01-31 21:23:00,336 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:00,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1070730092, now seen corresponding path program 370 times [2022-01-31 21:23:00,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:00,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976579044] [2022-01-31 21:23:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:00,337 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:00,337 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:00,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:00,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:00,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:00,711 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:00,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976579044] [2022-01-31 21:23:00,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1976579044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:00,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:00,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:23:00,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030275832] [2022-01-31 21:23:00,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:00,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:23:00,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:23:00,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:23:00,712 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:01,959 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:23:01,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:23:01,959 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:23:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:01,959 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:23:01,959 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:23:01,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:23:01,960 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:01,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 29 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:23:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:23:02,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 213. [2022-01-31 21:23:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-01-31 21:23:02,295 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 66 [2022-01-31 21:23:02,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:02,295 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-01-31 21:23:02,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-01-31 21:23:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:23:02,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:02,295 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:02,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372 [2022-01-31 21:23:02,296 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:02,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:02,296 INFO L85 PathProgramCache]: Analyzing trace with hash -175844628, now seen corresponding path program 371 times [2022-01-31 21:23:02,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:02,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461841373] [2022-01-31 21:23:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:02,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:02,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:02,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:02,297 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:02,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:02,646 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:02,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461841373] [2022-01-31 21:23:02,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [461841373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:02,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:02,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:23:02,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816578360] [2022-01-31 21:23:02,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:02,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:23:02,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:23:02,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:23:02,648 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:03,839 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-01-31 21:23:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:23:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:23:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:03,840 INFO L225 Difference]: With dead ends: 302 [2022-01-31 21:23:03,840 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:23:03,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:23:03,840 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:03,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:23:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 215. [2022-01-31 21:23:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-01-31 21:23:04,189 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 66 [2022-01-31 21:23:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:04,189 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-01-31 21:23:04,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-01-31 21:23:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:23:04,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:04,190 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:04,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373 [2022-01-31 21:23:04,190 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:04,190 INFO L85 PathProgramCache]: Analyzing trace with hash 161725036, now seen corresponding path program 372 times [2022-01-31 21:23:04,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:04,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416353671] [2022-01-31 21:23:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:04,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:04,191 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:04,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:04,191 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:04,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:04,541 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:04,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416353671] [2022-01-31 21:23:04,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [416353671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:04,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:04,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:23:04,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517740850] [2022-01-31 21:23:04,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:04,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:23:04,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:04,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:23:04,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:23:04,542 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:05,729 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-01-31 21:23:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:23:05,729 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:23:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:05,730 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:23:05,730 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:23:05,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:23:05,730 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:05,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:05,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:23:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 217. [2022-01-31 21:23:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-01-31 21:23:06,112 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 66 [2022-01-31 21:23:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:06,112 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-01-31 21:23:06,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-01-31 21:23:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:23:06,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:06,113 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:06,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374 [2022-01-31 21:23:06,113 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:06,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1851342356, now seen corresponding path program 373 times [2022-01-31 21:23:06,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:06,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457391269] [2022-01-31 21:23:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:06,114 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:06,114 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:06,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:06,115 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:06,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:06,523 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457391269] [2022-01-31 21:23:06,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [457391269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:06,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:06,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:23:06,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140168124] [2022-01-31 21:23:06,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:06,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:23:06,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:23:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:23:06,524 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:07,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:07,688 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-01-31 21:23:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:23:07,688 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:23:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:07,689 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:23:07,689 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:23:07,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:23:07,689 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:07,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:23:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 219. [2022-01-31 21:23:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-01-31 21:23:08,044 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 66 [2022-01-31 21:23:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:08,044 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-01-31 21:23:08,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-01-31 21:23:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:23:08,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:08,045 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:08,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375 [2022-01-31 21:23:08,045 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash 621144428, now seen corresponding path program 374 times [2022-01-31 21:23:08,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:08,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136877267] [2022-01-31 21:23:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:08,046 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:08,046 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:08,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:08,047 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:08,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:08,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:08,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136877267] [2022-01-31 21:23:08,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136877267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:08,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:08,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:23:08,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306370527] [2022-01-31 21:23:08,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:08,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:23:08,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:23:08,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:23:08,281 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:09,285 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-01-31 21:23:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:23:09,285 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:23:09,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:09,285 INFO L225 Difference]: With dead ends: 320 [2022-01-31 21:23:09,285 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:23:09,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:23:09,286 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:09,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:23:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 221. [2022-01-31 21:23:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-01-31 21:23:09,650 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 66 [2022-01-31 21:23:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:09,650 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-01-31 21:23:09,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-01-31 21:23:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:23:09,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:09,651 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:09,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376 [2022-01-31 21:23:09,651 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1564029164, now seen corresponding path program 375 times [2022-01-31 21:23:09,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:09,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718111377] [2022-01-31 21:23:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:09,652 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:09,652 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:09,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:09,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:09,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:09,874 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:09,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718111377] [2022-01-31 21:23:09,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1718111377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:09,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:09,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:23:09,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720905767] [2022-01-31 21:23:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:09,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:23:09,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:09,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:23:09,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:23:09,875 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:10,927 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-01-31 21:23:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:23:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:23:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:10,928 INFO L225 Difference]: With dead ends: 326 [2022-01-31 21:23:10,928 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:23:10,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:23:10,928 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:10,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:23:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 223. [2022-01-31 21:23:11,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-01-31 21:23:11,334 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 66 [2022-01-31 21:23:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:11,334 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-01-31 21:23:11,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-01-31 21:23:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:23:11,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:11,334 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:11,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377 [2022-01-31 21:23:11,334 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:11,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:11,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1438161004, now seen corresponding path program 376 times [2022-01-31 21:23:11,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:11,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244927105] [2022-01-31 21:23:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:11,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:11,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:11,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:11,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:11,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:11,633 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 21:23:11,634 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:11,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244927105] [2022-01-31 21:23:11,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1244927105] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:11,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:11,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:23:11,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659780596] [2022-01-31 21:23:11,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:11,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:23:11,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:11,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:23:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:23:11,635 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:12,883 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-01-31 21:23:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:23:12,884 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:23:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:12,884 INFO L225 Difference]: With dead ends: 332 [2022-01-31 21:23:12,885 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 21:23:12,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:23:12,885 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:12,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 17 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:12,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 21:23:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 225. [2022-01-31 21:23:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-01-31 21:23:13,274 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 66 [2022-01-31 21:23:13,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:13,274 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-01-31 21:23:13,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-01-31 21:23:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:23:13,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:13,274 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:13,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable378 [2022-01-31 21:23:13,275 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:13,275 INFO L85 PathProgramCache]: Analyzing trace with hash 737943532, now seen corresponding path program 377 times [2022-01-31 21:23:13,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:13,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626103576] [2022-01-31 21:23:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:13,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:13,276 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:13,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:13,276 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:13,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:13,637 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 21:23:13,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:13,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626103576] [2022-01-31 21:23:13,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1626103576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:13,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:13,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:23:13,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953555207] [2022-01-31 21:23:13,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:13,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:23:13,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:13,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:23:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:23:13,638 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:14,761 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:23:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:23:14,761 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:23:14,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:14,762 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:23:14,762 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:23:14,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:23:14,762 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:14,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:23:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 175. [2022-01-31 21:23:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-01-31 21:23:15,012 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 66 [2022-01-31 21:23:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:15,012 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-01-31 21:23:15,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-01-31 21:23:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:15,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:15,013 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:15,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379 [2022-01-31 21:23:15,013 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:15,013 INFO L85 PathProgramCache]: Analyzing trace with hash 951415631, now seen corresponding path program 378 times [2022-01-31 21:23:15,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:15,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829116349] [2022-01-31 21:23:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:15,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:15,014 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:15,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:15,015 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:15,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:15,400 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:15,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829116349] [2022-01-31 21:23:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829116349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:15,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:15,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:15,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849113127] [2022-01-31 21:23:15,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:15,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:15,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:15,401 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:16,198 INFO L93 Difference]: Finished difference Result 190 states and 276 transitions. [2022-01-31 21:23:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:16,198 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:16,199 INFO L225 Difference]: With dead ends: 190 [2022-01-31 21:23:16,199 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 21:23:16,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:16,199 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:16,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 17 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 21:23:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2022-01-31 21:23:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-01-31 21:23:16,461 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 68 [2022-01-31 21:23:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:16,461 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-01-31 21:23:16,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:16,461 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-01-31 21:23:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:16,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:16,461 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:16,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380 [2022-01-31 21:23:16,462 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash -143533361, now seen corresponding path program 379 times [2022-01-31 21:23:16,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:16,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661086142] [2022-01-31 21:23:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:16,463 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:16,463 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:16,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:16,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:16,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:16,784 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:16,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661086142] [2022-01-31 21:23:16,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1661086142] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:16,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:16,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:16,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768698317] [2022-01-31 21:23:16,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:16,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:16,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:16,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:16,785 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:17,664 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-01-31 21:23:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:17,665 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:17,665 INFO L225 Difference]: With dead ends: 194 [2022-01-31 21:23:17,665 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:23:17,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:17,666 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:17,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:17,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:23:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2022-01-31 21:23:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-01-31 21:23:17,927 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 68 [2022-01-31 21:23:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:17,927 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-01-31 21:23:17,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-01-31 21:23:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:17,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:17,927 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:17,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381 [2022-01-31 21:23:17,927 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash -122527153, now seen corresponding path program 380 times [2022-01-31 21:23:17,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:17,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795061861] [2022-01-31 21:23:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:17,929 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:17,929 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:17,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:17,929 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:18,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:18,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:18,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795061861] [2022-01-31 21:23:18,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [795061861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:18,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:18,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:18,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929063222] [2022-01-31 21:23:18,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:18,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:18,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:18,273 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:19,285 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:23:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:19,285 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:19,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:19,287 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:23:19,287 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:23:19,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:19,288 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:19,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:23:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2022-01-31 21:23:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-01-31 21:23:19,593 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 68 [2022-01-31 21:23:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:19,594 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-01-31 21:23:19,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:19,595 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-01-31 21:23:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:19,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:19,596 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:19,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382 [2022-01-31 21:23:19,597 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1410397745, now seen corresponding path program 381 times [2022-01-31 21:23:19,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:19,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463053790] [2022-01-31 21:23:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:19,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:19,610 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:19,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:19,611 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:19,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:19,959 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:19,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463053790] [2022-01-31 21:23:19,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [463053790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:19,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:19,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:19,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905296517] [2022-01-31 21:23:19,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:19,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:19,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:19,960 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:20,828 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:23:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:20,828 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:20,829 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:23:20,829 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:23:20,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:20,829 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:20,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 15 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:23:21,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 187. [2022-01-31 21:23:21,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-01-31 21:23:21,135 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 68 [2022-01-31 21:23:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:21,135 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-01-31 21:23:21,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-01-31 21:23:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:21,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:21,135 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:21,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383 [2022-01-31 21:23:21,136 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:21,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:21,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2103455409, now seen corresponding path program 382 times [2022-01-31 21:23:21,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:21,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253785030] [2022-01-31 21:23:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:21,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:21,137 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:21,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:21,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:21,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:21,394 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:21,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253785030] [2022-01-31 21:23:21,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253785030] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:21,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:21,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:21,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256690956] [2022-01-31 21:23:21,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:21,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:21,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:21,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:21,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:21,395 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:22,318 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:23:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:22,318 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:22,319 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:23:22,319 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:23:22,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:22,320 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:22,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:23:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 189. [2022-01-31 21:23:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-01-31 21:23:22,627 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 68 [2022-01-31 21:23:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:22,628 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-01-31 21:23:22,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-01-31 21:23:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:22,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:22,628 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:22,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384 [2022-01-31 21:23:22,628 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1883027663, now seen corresponding path program 383 times [2022-01-31 21:23:22,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:22,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736915407] [2022-01-31 21:23:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:22,629 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:22,629 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:22,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:22,630 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:22,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:22,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736915407] [2022-01-31 21:23:22,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736915407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:22,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:22,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:22,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335935169] [2022-01-31 21:23:22,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:22,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:22,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:22,963 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:23,976 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:23:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:23,976 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:23,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:23,977 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:23:23,977 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:23:23,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:23,977 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:23,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:23:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2022-01-31 21:23:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-01-31 21:23:24,260 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 68 [2022-01-31 21:23:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:24,261 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-01-31 21:23:24,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-01-31 21:23:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:24,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:24,261 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:24,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385 [2022-01-31 21:23:24,261 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:24,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:24,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1782431823, now seen corresponding path program 384 times [2022-01-31 21:23:24,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:24,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173884224] [2022-01-31 21:23:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:24,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:24,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:24,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:24,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:24,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:24,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173884224] [2022-01-31 21:23:24,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173884224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:24,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:24,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:24,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737254886] [2022-01-31 21:23:24,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:24,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:24,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:24,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:24,642 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:25,562 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:23:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:25,563 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:23:25,563 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:23:25,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:25,563 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:25,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 27 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:23:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 193. [2022-01-31 21:23:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-01-31 21:23:25,863 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 68 [2022-01-31 21:23:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:25,863 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-01-31 21:23:25,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-01-31 21:23:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:25,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:25,863 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:25,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386 [2022-01-31 21:23:25,864 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash -400889905, now seen corresponding path program 385 times [2022-01-31 21:23:25,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:25,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204767298] [2022-01-31 21:23:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:25,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:25,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:25,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:25,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:26,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:26,121 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 21:23:26,121 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:26,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204767298] [2022-01-31 21:23:26,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [204767298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:26,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:26,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:26,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159872772] [2022-01-31 21:23:26,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:26,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:26,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:26,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:26,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:26,122 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:26,972 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:23:26,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:26,972 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:26,972 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:23:26,972 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:23:26,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:26,973 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:26,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:23:27,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 195. [2022-01-31 21:23:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-01-31 21:23:27,290 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 68 [2022-01-31 21:23:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:27,290 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-01-31 21:23:27,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-01-31 21:23:27,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:27,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:27,290 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:27,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387 [2022-01-31 21:23:27,291 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:27,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:27,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1665937231, now seen corresponding path program 386 times [2022-01-31 21:23:27,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:27,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955289814] [2022-01-31 21:23:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:27,292 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:27,292 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:27,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:27,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:27,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:27,532 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 21:23:27,533 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:27,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955289814] [2022-01-31 21:23:27,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [955289814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:27,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:27,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:27,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328247236] [2022-01-31 21:23:27,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:27,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:27,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:27,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:27,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:27,534 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:28,445 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:23:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:28,446 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:28,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:28,446 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:23:28,446 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:23:28,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:28,447 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:28,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 17 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:23:28,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 197. [2022-01-31 21:23:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-01-31 21:23:28,759 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 68 [2022-01-31 21:23:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:28,759 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-01-31 21:23:28,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-01-31 21:23:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:28,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:28,760 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:28,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388 [2022-01-31 21:23:28,760 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash -683043121, now seen corresponding path program 387 times [2022-01-31 21:23:28,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181809498] [2022-01-31 21:23:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:28,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:28,761 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:28,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:28,762 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:29,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:29,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181809498] [2022-01-31 21:23:29,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1181809498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:29,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:29,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:29,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253170244] [2022-01-31 21:23:29,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:29,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:29,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:29,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:29,010 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:29,926 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:23:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:29,926 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:29,926 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:23:29,926 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:23:29,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:29,927 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:29,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:23:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 199. [2022-01-31 21:23:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-01-31 21:23:30,243 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 68 [2022-01-31 21:23:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:30,243 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-01-31 21:23:30,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-01-31 21:23:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:30,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:30,244 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:30,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable389 [2022-01-31 21:23:30,244 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:30,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1099636303, now seen corresponding path program 388 times [2022-01-31 21:23:30,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:30,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673885893] [2022-01-31 21:23:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:30,245 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:30,245 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:30,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:30,246 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:30,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:30,689 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:30,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673885893] [2022-01-31 21:23:30,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673885893] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:30,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:30,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:30,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815601667] [2022-01-31 21:23:30,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:30,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:30,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:30,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:30,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:30,690 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:31,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:31,823 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:23:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:31,823 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:31,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:31,824 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:23:31,824 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:23:31,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:31,824 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:31,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:23:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 201. [2022-01-31 21:23:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-01-31 21:23:32,138 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 68 [2022-01-31 21:23:32,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:32,139 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-01-31 21:23:32,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-01-31 21:23:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:32,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:32,139 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:32,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390 [2022-01-31 21:23:32,139 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash 562611663, now seen corresponding path program 389 times [2022-01-31 21:23:32,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:32,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803563437] [2022-01-31 21:23:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:32,140 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:32,140 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:32,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:32,141 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:32,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:32,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:32,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803563437] [2022-01-31 21:23:32,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803563437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:32,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:32,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:32,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231528017] [2022-01-31 21:23:32,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:32,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:32,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:32,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:32,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:32,514 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:33,654 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:23:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:33,655 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:23:33,655 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:23:33,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:33,655 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:33,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:23:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 203. [2022-01-31 21:23:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-01-31 21:23:34,011 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 68 [2022-01-31 21:23:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:34,012 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-01-31 21:23:34,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-01-31 21:23:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:34,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:34,012 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:34,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391 [2022-01-31 21:23:34,012 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:34,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:34,012 INFO L85 PathProgramCache]: Analyzing trace with hash -121991857, now seen corresponding path program 390 times [2022-01-31 21:23:34,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:34,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266687670] [2022-01-31 21:23:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:34,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:34,016 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:34,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:34,016 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:34,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:34,391 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:34,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266687670] [2022-01-31 21:23:34,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [266687670] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:34,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:34,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:34,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346453156] [2022-01-31 21:23:34,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:34,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:34,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:34,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:34,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:34,393 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:35,454 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:23:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:35,455 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:35,455 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:23:35,455 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:23:35,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:35,456 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:35,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:23:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 205. [2022-01-31 21:23:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-01-31 21:23:35,788 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 68 [2022-01-31 21:23:35,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:35,788 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-01-31 21:23:35,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-01-31 21:23:35,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:35,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:35,789 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:35,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392 [2022-01-31 21:23:35,789 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:35,789 INFO L85 PathProgramCache]: Analyzing trace with hash -895978289, now seen corresponding path program 391 times [2022-01-31 21:23:35,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:35,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998764365] [2022-01-31 21:23:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:35,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:35,790 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:35,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:35,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:36,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:36,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:36,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998764365] [2022-01-31 21:23:36,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [998764365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:36,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:36,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:36,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068568680] [2022-01-31 21:23:36,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:36,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:36,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:36,192 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:37,255 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:23:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:37,255 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:37,255 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:23:37,255 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:23:37,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:37,256 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:37,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:23:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 207. [2022-01-31 21:23:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-01-31 21:23:37,582 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 68 [2022-01-31 21:23:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:37,583 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-01-31 21:23:37,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-01-31 21:23:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:37,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:37,583 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:37,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393 [2022-01-31 21:23:37,583 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1667597233, now seen corresponding path program 392 times [2022-01-31 21:23:37,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576890658] [2022-01-31 21:23:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:37,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:37,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:37,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:37,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:37,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:37,909 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 21:23:37,910 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:37,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576890658] [2022-01-31 21:23:37,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [576890658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:37,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:37,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:37,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656981387] [2022-01-31 21:23:37,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:37,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:37,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:37,911 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:39,095 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:23:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:39,096 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:39,096 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:23:39,096 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:23:39,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:39,096 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:39,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 17 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:23:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 209. [2022-01-31 21:23:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-01-31 21:23:39,457 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 68 [2022-01-31 21:23:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:39,457 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-01-31 21:23:39,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-01-31 21:23:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:39,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:39,458 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:39,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394 [2022-01-31 21:23:39,458 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash -164060209, now seen corresponding path program 393 times [2022-01-31 21:23:39,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:39,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175575042] [2022-01-31 21:23:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:39,459 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:39,459 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:39,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:39,459 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:39,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:39,777 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175575042] [2022-01-31 21:23:39,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [175575042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:39,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:39,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:39,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672546560] [2022-01-31 21:23:39,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:39,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:39,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:39,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:39,779 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:41,000 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:23:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:41,001 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:23:41,001 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:23:41,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:41,001 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:41,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:23:41,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 211. [2022-01-31 21:23:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-01-31 21:23:41,358 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 68 [2022-01-31 21:23:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:41,358 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-01-31 21:23:41,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-01-31 21:23:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:41,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:41,359 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:41,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395 [2022-01-31 21:23:41,359 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:41,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:41,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1626008399, now seen corresponding path program 394 times [2022-01-31 21:23:41,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:41,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807366866] [2022-01-31 21:23:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:41,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:41,360 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:41,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:41,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:41,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:41,737 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807366866] [2022-01-31 21:23:41,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [807366866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:41,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:41,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:41,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762060056] [2022-01-31 21:23:41,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:41,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:41,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:41,738 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:42,868 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:23:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:42,869 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:42,869 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:23:42,869 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:23:42,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:42,870 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:42,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 15 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:23:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 213. [2022-01-31 21:23:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-01-31 21:23:43,272 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 68 [2022-01-31 21:23:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:43,272 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-01-31 21:23:43,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-01-31 21:23:43,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:43,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:43,272 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:43,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396 [2022-01-31 21:23:43,272 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:43,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:43,273 INFO L85 PathProgramCache]: Analyzing trace with hash -399945009, now seen corresponding path program 395 times [2022-01-31 21:23:43,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:43,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906031736] [2022-01-31 21:23:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:43,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:43,274 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:43,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:43,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:43,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:43,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906031736] [2022-01-31 21:23:43,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1906031736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:43,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:43,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:43,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961393157] [2022-01-31 21:23:43,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:43,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:43,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:43,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:43,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:43,602 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:44,926 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:23:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:44,927 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:44,927 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:23:44,927 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:23:44,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:44,928 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:44,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:23:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:23:45,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 215. [2022-01-31 21:23:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:45,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-01-31 21:23:45,304 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 68 [2022-01-31 21:23:45,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:45,304 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-01-31 21:23:45,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:45,304 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-01-31 21:23:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:45,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:45,304 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:45,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397 [2022-01-31 21:23:45,304 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:45,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1720985009, now seen corresponding path program 396 times [2022-01-31 21:23:45,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:45,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046167281] [2022-01-31 21:23:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:45,306 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:45,306 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:45,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:45,306 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:45,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:45,693 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 21:23:45,693 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:45,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046167281] [2022-01-31 21:23:45,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046167281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:45,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:45,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:45,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488563614] [2022-01-31 21:23:45,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:45,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:45,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:45,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:45,694 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:46,974 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:23:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:46,974 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:46,975 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:23:46,975 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:23:46,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:46,975 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:46,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:46,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:23:47,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 217. [2022-01-31 21:23:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-01-31 21:23:47,345 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 68 [2022-01-31 21:23:47,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:47,345 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-01-31 21:23:47,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:47,345 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-01-31 21:23:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:47,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:47,345 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:47,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398 [2022-01-31 21:23:47,345 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash 69894607, now seen corresponding path program 397 times [2022-01-31 21:23:47,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:47,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578919393] [2022-01-31 21:23:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:47,347 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:47,347 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:47,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:47,347 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:47,718 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:47,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578919393] [2022-01-31 21:23:47,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [578919393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:47,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:47,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:47,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047625032] [2022-01-31 21:23:47,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:47,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:47,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:47,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:47,719 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:48,850 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-01-31 21:23:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:48,850 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:48,851 INFO L225 Difference]: With dead ends: 302 [2022-01-31 21:23:48,851 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:23:48,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:48,851 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:48,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:23:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 219. [2022-01-31 21:23:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-01-31 21:23:49,231 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 68 [2022-01-31 21:23:49,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:49,231 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-01-31 21:23:49,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-01-31 21:23:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:49,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:49,232 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:49,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399 [2022-01-31 21:23:49,232 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1176680113, now seen corresponding path program 398 times [2022-01-31 21:23:49,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:49,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311330847] [2022-01-31 21:23:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:49,233 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:49,233 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:49,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:49,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:49,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:49,475 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:49,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311330847] [2022-01-31 21:23:49,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [311330847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:49,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:49,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:49,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458511994] [2022-01-31 21:23:49,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:49,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:49,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:49,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:49,476 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:50,558 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-01-31 21:23:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:50,559 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:23:50,559 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:23:50,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:50,560 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:50,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:50,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:23:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 221. [2022-01-31 21:23:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-01-31 21:23:50,988 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 68 [2022-01-31 21:23:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:50,988 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-01-31 21:23:50,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-01-31 21:23:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:50,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:50,989 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:50,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400 [2022-01-31 21:23:50,989 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -839110449, now seen corresponding path program 399 times [2022-01-31 21:23:50,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:50,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933640821] [2022-01-31 21:23:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:50,990 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:50,990 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:50,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:50,991 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:51,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:51,239 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:51,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933640821] [2022-01-31 21:23:51,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1933640821] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:51,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:51,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:51,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741176996] [2022-01-31 21:23:51,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:51,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:51,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:51,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:51,240 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:52,406 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-01-31 21:23:52,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:52,406 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:52,407 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:23:52,407 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:23:52,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:52,407 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:52,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:23:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 223. [2022-01-31 21:23:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-01-31 21:23:52,812 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 68 [2022-01-31 21:23:52,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:52,812 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-01-31 21:23:52,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-01-31 21:23:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:52,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:52,813 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:52,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401 [2022-01-31 21:23:52,813 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:52,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1442789455, now seen corresponding path program 400 times [2022-01-31 21:23:52,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:52,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903497894] [2022-01-31 21:23:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:52,814 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:52,814 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:52,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:52,815 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:53,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:23:53,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903497894] [2022-01-31 21:23:53,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [903497894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:53,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:53,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:53,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050264423] [2022-01-31 21:23:53,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:53,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:53,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:53,065 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:54,164 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-01-31 21:23:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:54,165 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:54,165 INFO L225 Difference]: With dead ends: 320 [2022-01-31 21:23:54,165 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:23:54,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:54,166 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:54,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:23:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 225. [2022-01-31 21:23:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-01-31 21:23:54,556 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 68 [2022-01-31 21:23:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:54,556 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-01-31 21:23:54,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-01-31 21:23:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:54,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:54,557 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:54,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402 [2022-01-31 21:23:54,557 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash -379691057, now seen corresponding path program 401 times [2022-01-31 21:23:54,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:54,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569296787] [2022-01-31 21:23:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:54,558 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:54,558 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:54,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:54,558 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:54,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:54,956 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 21:23:54,956 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:54,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569296787] [2022-01-31 21:23:54,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [569296787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:54,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:54,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:54,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947156083] [2022-01-31 21:23:54,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:54,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:54,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:54,957 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:56,292 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-01-31 21:23:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:56,293 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:56,293 INFO L225 Difference]: With dead ends: 326 [2022-01-31 21:23:56,293 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:23:56,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:56,294 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:56,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:23:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 227. [2022-01-31 21:23:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-01-31 21:23:56,687 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 68 [2022-01-31 21:23:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:56,687 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-01-31 21:23:56,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-01-31 21:23:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:56,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:56,688 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:56,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403 [2022-01-31 21:23:56,688 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash 563193679, now seen corresponding path program 402 times [2022-01-31 21:23:56,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:56,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457740007] [2022-01-31 21:23:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:56,689 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:56,689 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:56,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:56,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:57,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:57,071 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 21:23:57,071 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:57,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457740007] [2022-01-31 21:23:57,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [457740007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:57,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:57,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:57,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376618598] [2022-01-31 21:23:57,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:57,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:57,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:57,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:57,072 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:23:58,429 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-01-31 21:23:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:23:58,429 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:23:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:23:58,429 INFO L225 Difference]: With dead ends: 332 [2022-01-31 21:23:58,429 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 21:23:58,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:23:58,430 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:23:58,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 27 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:23:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 21:23:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2022-01-31 21:23:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-01-31 21:23:58,815 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 68 [2022-01-31 21:23:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:23:58,815 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-01-31 21:23:58,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:23:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-01-31 21:23:58,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:23:58,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:23:58,815 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:23:58,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404 [2022-01-31 21:23:58,816 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:23:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:23:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash 437325519, now seen corresponding path program 403 times [2022-01-31 21:23:58,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:23:58,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973345536] [2022-01-31 21:23:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:23:58,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:23:58,817 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:23:58,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:23:58,817 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:23:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:59,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:23:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:23:59,193 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 21:23:59,193 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:23:59,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973345536] [2022-01-31 21:23:59,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [973345536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:23:59,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:23:59,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:23:59,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603058458] [2022-01-31 21:23:59,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:23:59,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:23:59,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:23:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:23:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:23:59,194 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:00,551 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-01-31 21:24:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:24:00,551 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:24:00,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:00,552 INFO L225 Difference]: With dead ends: 338 [2022-01-31 21:24:00,552 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 21:24:00,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:24:00,552 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:00,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 21:24:00,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 231. [2022-01-31 21:24:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-01-31 21:24:00,968 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 68 [2022-01-31 21:24:00,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:00,969 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-01-31 21:24:00,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-01-31 21:24:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:24:00,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:00,969 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:00,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405 [2022-01-31 21:24:00,969 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:00,969 INFO L85 PathProgramCache]: Analyzing trace with hash -262891953, now seen corresponding path program 404 times [2022-01-31 21:24:00,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:00,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210321973] [2022-01-31 21:24:00,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:00,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:00,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:00,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:00,971 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:01,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:01,343 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:01,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210321973] [2022-01-31 21:24:01,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [210321973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:01,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:01,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:24:01,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944154965] [2022-01-31 21:24:01,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:01,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:24:01,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:01,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:24:01,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:24:01,344 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:02,674 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-01-31 21:24:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:24:02,674 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:24:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:02,674 INFO L225 Difference]: With dead ends: 344 [2022-01-31 21:24:02,674 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 21:24:02,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:24:02,675 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:02,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 25 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:02,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 21:24:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 233. [2022-01-31 21:24:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-01-31 21:24:03,072 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 68 [2022-01-31 21:24:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:03,072 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-01-31 21:24:03,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-01-31 21:24:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:24:03,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:03,073 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:03,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406 [2022-01-31 21:24:03,073 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:03,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1137982927, now seen corresponding path program 405 times [2022-01-31 21:24:03,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:03,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122289781] [2022-01-31 21:24:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:03,074 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:03,074 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:03,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:03,075 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:03,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:03,448 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122289781] [2022-01-31 21:24:03,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [122289781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:03,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:03,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:24:03,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547500929] [2022-01-31 21:24:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:03,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:24:03,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:03,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:24:03,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:24:03,449 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:04,658 INFO L93 Difference]: Finished difference Result 294 states and 431 transitions. [2022-01-31 21:24:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:24:04,659 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have 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 21:24:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:04,659 INFO L225 Difference]: With dead ends: 294 [2022-01-31 21:24:04,659 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 21:24:04,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:24:04,660 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:04,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:04,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 21:24:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 181. [2022-01-31 21:24:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-01-31 21:24:04,918 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 68 [2022-01-31 21:24:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:04,918 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-01-31 21:24:04,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-01-31 21:24:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:04,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:04,919 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:04,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407 [2022-01-31 21:24:04,919 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:04,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1221188850, now seen corresponding path program 406 times [2022-01-31 21:24:04,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:04,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336574272] [2022-01-31 21:24:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:04,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:04,920 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:04,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:04,920 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:05,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:05,315 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:05,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336574272] [2022-01-31 21:24:05,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [336574272] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:05,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:05,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:05,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706058147] [2022-01-31 21:24:05,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:05,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:05,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:05,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:05,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:05,316 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:06,214 INFO L93 Difference]: Finished difference Result 196 states and 285 transitions. [2022-01-31 21:24:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:06,214 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:06,215 INFO L225 Difference]: With dead ends: 196 [2022-01-31 21:24:06,215 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 21:24:06,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:06,215 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:06,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 21 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 21:24:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2022-01-31 21:24:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-01-31 21:24:06,493 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 70 [2022-01-31 21:24:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:06,493 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-01-31 21:24:06,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-01-31 21:24:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:06,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:06,494 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:06,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408 [2022-01-31 21:24:06,494 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:06,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:06,494 INFO L85 PathProgramCache]: Analyzing trace with hash 126239858, now seen corresponding path program 407 times [2022-01-31 21:24:06,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:06,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756039346] [2022-01-31 21:24:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:06,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:06,495 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:06,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:06,496 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:06,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:06,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:06,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756039346] [2022-01-31 21:24:06,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1756039346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:06,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:06,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:06,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041702387] [2022-01-31 21:24:06,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:06,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:06,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:06,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:06,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:06,752 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:07,609 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-01-31 21:24:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:07,609 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:07,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:07,609 INFO L225 Difference]: With dead ends: 200 [2022-01-31 21:24:07,609 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 21:24:07,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:07,610 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:07,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 29 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:07,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 21:24:07,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2022-01-31 21:24:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-01-31 21:24:07,912 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 70 [2022-01-31 21:24:07,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:07,912 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-01-31 21:24:07,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-01-31 21:24:07,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:07,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:07,913 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:07,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409 [2022-01-31 21:24:07,913 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:07,913 INFO L85 PathProgramCache]: Analyzing trace with hash 147246066, now seen corresponding path program 408 times [2022-01-31 21:24:07,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:07,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870602722] [2022-01-31 21:24:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:07,914 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:07,914 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:07,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:07,915 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:08,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:08,173 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:08,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870602722] [2022-01-31 21:24:08,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1870602722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:08,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:08,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:08,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107382951] [2022-01-31 21:24:08,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:08,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:08,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:08,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:08,175 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:09,016 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:24:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:09,017 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:24:09,017 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:24:09,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:09,018 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:09,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 17 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:24:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 191. [2022-01-31 21:24:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-01-31 21:24:09,314 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 70 [2022-01-31 21:24:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:09,314 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-01-31 21:24:09,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-01-31 21:24:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:09,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:09,314 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:09,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410 [2022-01-31 21:24:09,314 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:09,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:09,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1140624526, now seen corresponding path program 409 times [2022-01-31 21:24:09,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:09,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597352553] [2022-01-31 21:24:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:09,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:09,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:09,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:09,316 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:09,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:09,560 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:09,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597352553] [2022-01-31 21:24:09,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1597352553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:09,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:09,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:09,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050396925] [2022-01-31 21:24:09,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:09,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:09,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:09,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:09,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:09,561 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:10,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:10,415 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:24:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:10,415 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:10,415 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:24:10,415 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:24:10,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:10,416 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:10,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:24:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 193. [2022-01-31 21:24:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-01-31 21:24:10,719 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 70 [2022-01-31 21:24:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:10,719 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-01-31 21:24:10,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-01-31 21:24:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:10,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:10,719 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:10,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411 [2022-01-31 21:24:10,720 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:10,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1833682190, now seen corresponding path program 410 times [2022-01-31 21:24:10,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:10,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150135712] [2022-01-31 21:24:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:10,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:10,721 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:10,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:10,721 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:10,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:10,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:10,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150135712] [2022-01-31 21:24:10,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [150135712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:10,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:10,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:10,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956124053] [2022-01-31 21:24:10,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:10,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:10,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:10,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:10,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:10,977 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:11,855 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:24:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:11,856 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:11,856 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:24:11,856 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:24:11,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:11,856 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:11,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:24:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 195. [2022-01-31 21:24:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-01-31 21:24:12,169 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 70 [2022-01-31 21:24:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:12,169 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-01-31 21:24:12,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-01-31 21:24:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:12,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:12,169 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:12,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412 [2022-01-31 21:24:12,169 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:12,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2142166414, now seen corresponding path program 411 times [2022-01-31 21:24:12,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:12,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780030445] [2022-01-31 21:24:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:12,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:12,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:12,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:12,171 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:12,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:12,534 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 21:24:12,534 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:12,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780030445] [2022-01-31 21:24:12,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1780030445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:12,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:12,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:12,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602714940] [2022-01-31 21:24:12,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:12,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:12,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:12,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:12,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:12,536 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:13,624 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:24:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:13,625 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:24:13,625 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:24:13,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:13,625 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:13,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:24:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 197. [2022-01-31 21:24:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-01-31 21:24:13,982 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 70 [2022-01-31 21:24:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:13,983 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-01-31 21:24:13,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-01-31 21:24:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:13,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:13,983 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:13,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413 [2022-01-31 21:24:13,983 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:13,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:13,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2052205042, now seen corresponding path program 412 times [2022-01-31 21:24:13,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:13,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100093982] [2022-01-31 21:24:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:13,984 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:13,984 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:13,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:13,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:14,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:14,347 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:14,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100093982] [2022-01-31 21:24:14,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100093982] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:14,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:14,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:14,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882933770] [2022-01-31 21:24:14,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:14,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:14,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:14,348 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:15,343 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:24:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:15,343 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:15,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:15,343 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:24:15,343 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:24:15,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:15,344 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:15,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:24:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 199. [2022-01-31 21:24:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-01-31 21:24:15,653 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 70 [2022-01-31 21:24:15,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:15,653 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-01-31 21:24:15,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:15,653 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-01-31 21:24:15,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:15,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:15,653 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:15,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414 [2022-01-31 21:24:15,653 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:15,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:15,654 INFO L85 PathProgramCache]: Analyzing trace with hash -131116686, now seen corresponding path program 413 times [2022-01-31 21:24:15,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:15,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431145573] [2022-01-31 21:24:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:15,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:15,655 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:15,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:15,655 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:16,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:16,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:16,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431145573] [2022-01-31 21:24:16,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [431145573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:16,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:16,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:16,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602867736] [2022-01-31 21:24:16,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:16,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:16,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:16,045 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:17,183 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:24:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:17,183 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:17,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:17,184 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:24:17,184 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:24:17,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:17,184 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:17,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 31 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:24:17,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:24:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 201. [2022-01-31 21:24:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-01-31 21:24:17,549 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 70 [2022-01-31 21:24:17,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:17,550 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-01-31 21:24:17,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-01-31 21:24:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:17,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:17,550 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:17,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415 [2022-01-31 21:24:17,550 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:17,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1935710450, now seen corresponding path program 414 times [2022-01-31 21:24:17,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:17,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16181552] [2022-01-31 21:24:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:17,551 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:17,551 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:17,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:17,552 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:17,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:17,880 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16181552] [2022-01-31 21:24:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [16181552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:17,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:17,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:17,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397450276] [2022-01-31 21:24:17,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:17,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:17,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:17,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:17,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:17,881 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:19,010 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:24:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:19,010 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:19,011 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:24:19,011 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:24:19,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:19,011 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:19,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:24:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 203. [2022-01-31 21:24:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-01-31 21:24:19,342 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 70 [2022-01-31 21:24:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:19,342 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-01-31 21:24:19,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-01-31 21:24:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:19,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:19,343 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:19,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416 [2022-01-31 21:24:19,343 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:19,343 INFO L85 PathProgramCache]: Analyzing trace with hash -413269902, now seen corresponding path program 415 times [2022-01-31 21:24:19,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:19,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967167767] [2022-01-31 21:24:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:19,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:19,344 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:19,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:19,344 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:19,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:19,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967167767] [2022-01-31 21:24:19,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [967167767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:19,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:19,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:19,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920847034] [2022-01-31 21:24:19,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:19,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:19,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:19,749 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:20,776 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:24:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:20,776 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:24:20,776 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:24:20,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:20,777 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:20,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:24:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 205. [2022-01-31 21:24:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-01-31 21:24:21,169 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 70 [2022-01-31 21:24:21,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:21,169 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-01-31 21:24:21,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-01-31 21:24:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:21,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:21,169 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:21,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417 [2022-01-31 21:24:21,169 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:21,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:21,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1369409522, now seen corresponding path program 416 times [2022-01-31 21:24:21,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:21,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245603643] [2022-01-31 21:24:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:21,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:21,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:21,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:21,183 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:21,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:21,544 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:21,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245603643] [2022-01-31 21:24:21,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [245603643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:21,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:21,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:21,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543840403] [2022-01-31 21:24:21,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:21,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:21,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:21,545 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:22,584 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:24:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:22,584 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:22,584 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:24:22,584 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:24:22,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:22,585 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:22,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:24:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 207. [2022-01-31 21:24:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-01-31 21:24:22,954 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 70 [2022-01-31 21:24:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:22,955 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-01-31 21:24:22,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-01-31 21:24:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:22,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:22,955 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:22,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418 [2022-01-31 21:24:22,955 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash 832384882, now seen corresponding path program 417 times [2022-01-31 21:24:22,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:22,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470989642] [2022-01-31 21:24:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:22,956 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:22,956 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:22,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:22,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:23,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:23,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:23,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470989642] [2022-01-31 21:24:23,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470989642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:23,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:23,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:23,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863131125] [2022-01-31 21:24:23,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:23,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:23,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:23,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:23,212 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:24,208 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:24:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:24,208 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:24,208 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:24:24,208 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:24:24,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:24,209 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:24,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:24:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2022-01-31 21:24:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-01-31 21:24:24,585 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 70 [2022-01-31 21:24:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:24,585 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-01-31 21:24:24,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-01-31 21:24:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:24,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:24,586 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:24,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419 [2022-01-31 21:24:24,586 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash 147781362, now seen corresponding path program 418 times [2022-01-31 21:24:24,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:24,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402128750] [2022-01-31 21:24:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:24,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:24,587 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:24,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:24,603 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:25,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:25,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:25,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402128750] [2022-01-31 21:24:25,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1402128750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:25,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:25,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:25,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012400257] [2022-01-31 21:24:25,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:25,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:25,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:25,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:25,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:25,014 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:26,278 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:24:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:26,278 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:26,279 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:24:26,279 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:24:26,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:26,279 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:26,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:24:26,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:24:26,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 211. [2022-01-31 21:24:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-01-31 21:24:26,641 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 70 [2022-01-31 21:24:26,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:26,641 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-01-31 21:24:26,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-01-31 21:24:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:26,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:26,642 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:26,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420 [2022-01-31 21:24:26,642 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:26,642 INFO L85 PathProgramCache]: Analyzing trace with hash -626205070, now seen corresponding path program 419 times [2022-01-31 21:24:26,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:26,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347459808] [2022-01-31 21:24:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:26,643 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:26,643 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:26,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:26,643 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:27,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:27,019 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347459808] [2022-01-31 21:24:27,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [347459808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:27,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:27,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:27,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116532650] [2022-01-31 21:24:27,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:27,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:27,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:27,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:27,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:27,020 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:28,236 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:24:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:28,237 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:28,237 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:24:28,237 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:24:28,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:28,238 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:28,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:24:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 213. [2022-01-31 21:24:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-01-31 21:24:28,645 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 70 [2022-01-31 21:24:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:28,646 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-01-31 21:24:28,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-01-31 21:24:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:28,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:28,646 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:28,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421 [2022-01-31 21:24:28,646 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:28,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:28,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1397824014, now seen corresponding path program 420 times [2022-01-31 21:24:28,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:28,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618255816] [2022-01-31 21:24:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:28,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:28,647 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:28,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:28,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:29,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:29,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:29,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618255816] [2022-01-31 21:24:29,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1618255816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:29,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:29,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:29,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002391978] [2022-01-31 21:24:29,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:29,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:29,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:29,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:29,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:29,042 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:30,321 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:24:30,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:30,322 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:30,322 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:24:30,322 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:24:30,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:30,323 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:30,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:24:30,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 215. [2022-01-31 21:24:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-01-31 21:24:30,684 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 70 [2022-01-31 21:24:30,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:30,684 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-01-31 21:24:30,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:30,684 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-01-31 21:24:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:30,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:30,685 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:30,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422 [2022-01-31 21:24:30,685 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:30,685 INFO L85 PathProgramCache]: Analyzing trace with hash 105713010, now seen corresponding path program 421 times [2022-01-31 21:24:30,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:30,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406537279] [2022-01-31 21:24:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:30,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:30,686 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:30,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:30,687 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:31,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:31,077 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 21:24:31,078 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:31,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406537279] [2022-01-31 21:24:31,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406537279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:31,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:31,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:31,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071910170] [2022-01-31 21:24:31,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:31,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:31,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:31,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:31,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:31,079 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:32,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:32,203 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:24:32,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:32,204 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:32,204 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:24:32,204 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:24:32,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:32,205 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:32,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:24:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 217. [2022-01-31 21:24:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-01-31 21:24:32,593 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 70 [2022-01-31 21:24:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:32,593 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-01-31 21:24:32,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-01-31 21:24:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:32,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:32,594 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:32,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423 [2022-01-31 21:24:32,594 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1895781618, now seen corresponding path program 422 times [2022-01-31 21:24:32,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:32,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555116371] [2022-01-31 21:24:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:32,595 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:32,595 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:32,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:32,596 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:32,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:32,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555116371] [2022-01-31 21:24:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555116371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:32,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:32,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:32,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069183490] [2022-01-31 21:24:32,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:32,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:32,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:32,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:32,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:32,848 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:33,957 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:24:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:33,957 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:33,957 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:24:33,957 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:24:33,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:33,958 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:33,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:24:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 219. [2022-01-31 21:24:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-01-31 21:24:34,365 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 70 [2022-01-31 21:24:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:34,365 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-01-31 21:24:34,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-01-31 21:24:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:34,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:34,366 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:34,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424 [2022-01-31 21:24:34,366 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:34,366 INFO L85 PathProgramCache]: Analyzing trace with hash -130171790, now seen corresponding path program 423 times [2022-01-31 21:24:34,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:34,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247059087] [2022-01-31 21:24:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:34,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:34,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:34,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:34,367 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:34,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:34,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247059087] [2022-01-31 21:24:34,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [247059087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:34,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:34,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:34,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468618199] [2022-01-31 21:24:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:34,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:34,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:34,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:34,654 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:35,757 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:24:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:35,758 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:35,758 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:24:35,758 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:24:35,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:35,758 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:35,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 24 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:24:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 221. [2022-01-31 21:24:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-01-31 21:24:36,170 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 70 [2022-01-31 21:24:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:36,170 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-01-31 21:24:36,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-01-31 21:24:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:36,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:36,171 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:36,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425 [2022-01-31 21:24:36,171 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1451211790, now seen corresponding path program 424 times [2022-01-31 21:24:36,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:36,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246107135] [2022-01-31 21:24:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:36,172 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:36,172 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:36,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:36,173 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:36,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:36,442 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:36,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246107135] [2022-01-31 21:24:36,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1246107135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:36,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:36,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:36,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252124099] [2022-01-31 21:24:36,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:36,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:36,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:36,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:36,443 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:37,609 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-01-31 21:24:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:37,609 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:37,610 INFO L225 Difference]: With dead ends: 302 [2022-01-31 21:24:37,610 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:24:37,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:37,610 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:37,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:24:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 223. [2022-01-31 21:24:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-01-31 21:24:38,021 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 70 [2022-01-31 21:24:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:38,021 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-01-31 21:24:38,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-01-31 21:24:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:38,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:38,021 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:38,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426 [2022-01-31 21:24:38,022 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:38,022 INFO L85 PathProgramCache]: Analyzing trace with hash 339667826, now seen corresponding path program 425 times [2022-01-31 21:24:38,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:38,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640234711] [2022-01-31 21:24:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:38,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:38,023 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:38,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:38,023 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:38,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:38,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:38,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640234711] [2022-01-31 21:24:38,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1640234711] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:38,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:38,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:38,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568703922] [2022-01-31 21:24:38,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:38,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:38,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:38,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:38,430 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:39,823 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-01-31 21:24:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:39,823 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:39,824 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:24:39,824 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:24:39,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:39,824 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:39,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:24:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 225. [2022-01-31 21:24:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-01-31 21:24:40,260 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 70 [2022-01-31 21:24:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:40,261 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-01-31 21:24:40,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-01-31 21:24:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:40,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:40,261 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:40,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427 [2022-01-31 21:24:40,261 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:40,261 INFO L85 PathProgramCache]: Analyzing trace with hash -906906894, now seen corresponding path program 426 times [2022-01-31 21:24:40,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:40,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873824451] [2022-01-31 21:24:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:40,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:40,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:40,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:40,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:40,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:40,656 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 21:24:40,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:40,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873824451] [2022-01-31 21:24:40,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [873824451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:40,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:40,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:40,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63425327] [2022-01-31 21:24:40,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:40,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:40,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:40,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:40,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:40,657 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:42,045 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-01-31 21:24:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:42,045 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:42,046 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:24:42,046 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:24:42,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:42,046 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:42,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:24:42,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:24:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 227. [2022-01-31 21:24:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-01-31 21:24:42,471 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 70 [2022-01-31 21:24:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:42,472 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-01-31 21:24:42,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-01-31 21:24:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:42,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:42,472 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:42,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428 [2022-01-31 21:24:42,472 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash -569337230, now seen corresponding path program 427 times [2022-01-31 21:24:42,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:42,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725821300] [2022-01-31 21:24:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:42,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:42,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:42,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:42,474 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:42,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:42,874 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:42,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725821300] [2022-01-31 21:24:42,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [725821300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:42,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:42,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:42,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410341561] [2022-01-31 21:24:42,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:42,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:42,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:42,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:42,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:42,875 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:44,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:44,119 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-01-31 21:24:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:44,119 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:44,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:44,120 INFO L225 Difference]: With dead ends: 320 [2022-01-31 21:24:44,120 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:24:44,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:44,120 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:44,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 27 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:24:44,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 229. [2022-01-31 21:24:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-01-31 21:24:44,527 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 70 [2022-01-31 21:24:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:44,527 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-01-31 21:24:44,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-01-31 21:24:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:44,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:44,528 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:44,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429 [2022-01-31 21:24:44,528 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:44,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:44,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1712562674, now seen corresponding path program 428 times [2022-01-31 21:24:44,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:44,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773054719] [2022-01-31 21:24:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:44,529 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:44,529 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:44,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:44,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:44,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:44,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:44,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773054719] [2022-01-31 21:24:44,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [773054719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:44,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:44,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:44,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086515759] [2022-01-31 21:24:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:44,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:44,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:44,776 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:45,962 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-01-31 21:24:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:45,962 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:45,963 INFO L225 Difference]: With dead ends: 326 [2022-01-31 21:24:45,963 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:24:45,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:45,963 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:45,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:24:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 231. [2022-01-31 21:24:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-01-31 21:24:46,370 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 70 [2022-01-31 21:24:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:46,370 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-01-31 21:24:46,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-01-31 21:24:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:46,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:46,370 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:46,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430 [2022-01-31 21:24:46,370 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash -109917838, now seen corresponding path program 429 times [2022-01-31 21:24:46,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:46,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978203692] [2022-01-31 21:24:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:46,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:46,372 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:46,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:46,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:46,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:46,693 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 21:24:46,693 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:46,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978203692] [2022-01-31 21:24:46,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [978203692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:46,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:46,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:46,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811184367] [2022-01-31 21:24:46,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:46,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:46,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:46,694 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:48,061 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-01-31 21:24:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:48,062 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:48,062 INFO L225 Difference]: With dead ends: 332 [2022-01-31 21:24:48,062 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 21:24:48,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:48,063 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:48,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 27 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:24:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 21:24:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 233. [2022-01-31 21:24:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-01-31 21:24:48,502 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 70 [2022-01-31 21:24:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:48,502 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-01-31 21:24:48,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-01-31 21:24:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:48,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:48,502 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:48,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431 [2022-01-31 21:24:48,502 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:48,502 INFO L85 PathProgramCache]: Analyzing trace with hash 832966898, now seen corresponding path program 430 times [2022-01-31 21:24:48,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:48,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370258755] [2022-01-31 21:24:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:48,503 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:48,503 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:48,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:48,504 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:48,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:48,835 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:48,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370258755] [2022-01-31 21:24:48,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370258755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:48,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:48,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:48,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644807361] [2022-01-31 21:24:48,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:48,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:48,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:48,836 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:50,171 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-01-31 21:24:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:50,172 INFO L225 Difference]: With dead ends: 338 [2022-01-31 21:24:50,172 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 21:24:50,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:50,172 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:50,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 21:24:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 235. [2022-01-31 21:24:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-01-31 21:24:50,593 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 70 [2022-01-31 21:24:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:50,593 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-01-31 21:24:50,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-01-31 21:24:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:50,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:50,593 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:50,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable432 [2022-01-31 21:24:50,594 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:50,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:50,594 INFO L85 PathProgramCache]: Analyzing trace with hash 707098738, now seen corresponding path program 431 times [2022-01-31 21:24:50,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:50,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950525535] [2022-01-31 21:24:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:50,595 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:50,595 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:50,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:50,595 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:50,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:50,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:50,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950525535] [2022-01-31 21:24:50,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950525535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:50,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:50,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:50,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866824434] [2022-01-31 21:24:50,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:50,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:50,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:50,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:50,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:50,996 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:52,466 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-01-31 21:24:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:52,467 INFO L225 Difference]: With dead ends: 344 [2022-01-31 21:24:52,467 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 21:24:52,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:52,467 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:52,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 21:24:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 237. [2022-01-31 21:24:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-01-31 21:24:52,886 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 70 [2022-01-31 21:24:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:52,886 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-01-31 21:24:52,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-01-31 21:24:52,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:52,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:52,887 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:52,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable433 [2022-01-31 21:24:52,887 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:52,887 INFO L85 PathProgramCache]: Analyzing trace with hash 6881266, now seen corresponding path program 432 times [2022-01-31 21:24:52,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:52,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158324261] [2022-01-31 21:24:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:52,888 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:52,888 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:52,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:52,888 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:53,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:53,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:53,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158324261] [2022-01-31 21:24:53,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [158324261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:53,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:53,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:53,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207199465] [2022-01-31 21:24:53,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:53,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:53,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:53,285 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:54,610 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-01-31 21:24:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:54,610 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:54,611 INFO L225 Difference]: With dead ends: 350 [2022-01-31 21:24:54,611 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 21:24:54,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:54,611 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:54,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 21:24:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 239. [2022-01-31 21:24:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:55,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-01-31 21:24:55,059 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 70 [2022-01-31 21:24:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:55,059 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-01-31 21:24:55,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-01-31 21:24:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:55,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:55,060 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:55,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434 [2022-01-31 21:24:55,060 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1407756146, now seen corresponding path program 433 times [2022-01-31 21:24:55,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:55,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543479441] [2022-01-31 21:24:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:55,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:55,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:55,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:55,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:55,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:55,486 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:55,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543479441] [2022-01-31 21:24:55,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [543479441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:55,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:55,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:55,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39394815] [2022-01-31 21:24:55,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:55,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:55,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:55,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:55,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:55,487 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:56,844 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-01-31 21:24:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:56,845 INFO L225 Difference]: With dead ends: 356 [2022-01-31 21:24:56,845 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 21:24:56,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:56,846 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:56,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 21:24:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 241. [2022-01-31 21:24:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-01-31 21:24:57,289 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 70 [2022-01-31 21:24:57,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:57,289 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-01-31 21:24:57,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-01-31 21:24:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:24:57,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:57,289 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:57,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435 [2022-01-31 21:24:57,289 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:57,290 INFO L85 PathProgramCache]: Analyzing trace with hash -971215118, now seen corresponding path program 434 times [2022-01-31 21:24:57,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:57,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614399031] [2022-01-31 21:24:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:57,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:57,290 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:57,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:57,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:57,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:57,682 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:57,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614399031] [2022-01-31 21:24:57,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [614399031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:57,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:57,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:24:57,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029047054] [2022-01-31 21:24:57,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:57,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:24:57,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:57,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:24:57,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:24:57,683 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:24:58,949 INFO L93 Difference]: Finished difference Result 304 states and 446 transitions. [2022-01-31 21:24:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:24:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:24:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:24:58,949 INFO L225 Difference]: With dead ends: 304 [2022-01-31 21:24:58,949 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 21:24:58,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:24:58,950 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:24:58,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 22 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:24:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 21:24:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 187. [2022-01-31 21:24:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-01-31 21:24:59,232 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 70 [2022-01-31 21:24:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:24:59,233 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-01-31 21:24:59,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:24:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-01-31 21:24:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:24:59,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:24:59,233 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:24:59,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436 [2022-01-31 21:24:59,233 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:24:59,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:24:59,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1519752747, now seen corresponding path program 435 times [2022-01-31 21:24:59,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:24:59,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393389111] [2022-01-31 21:24:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:24:59,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:24:59,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:24:59,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:24:59,235 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:24:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:59,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:24:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:24:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:24:59,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:24:59,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393389111] [2022-01-31 21:24:59,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [393389111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:24:59,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:24:59,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:24:59,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056271492] [2022-01-31 21:24:59,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:24:59,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:24:59,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:24:59,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:24:59,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:24:59,642 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:00,705 INFO L93 Difference]: Finished difference Result 202 states and 294 transitions. [2022-01-31 21:25:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:00,705 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:00,705 INFO L225 Difference]: With dead ends: 202 [2022-01-31 21:25:00,705 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 21:25:00,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:00,706 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:00,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 19 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 21:25:01,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2022-01-31 21:25:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:01,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-01-31 21:25:01,001 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 72 [2022-01-31 21:25:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:01,002 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-01-31 21:25:01,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-01-31 21:25:01,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:01,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:01,002 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:01,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437 [2022-01-31 21:25:01,002 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:01,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:01,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1680265557, now seen corresponding path program 436 times [2022-01-31 21:25:01,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:01,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748095566] [2022-01-31 21:25:01,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:01,003 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:01,003 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:01,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:01,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:01,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:01,416 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:01,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748095566] [2022-01-31 21:25:01,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [748095566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:01,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:01,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:01,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669849771] [2022-01-31 21:25:01,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:01,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:01,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:01,417 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:02,503 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-01-31 21:25:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:02,504 INFO L225 Difference]: With dead ends: 206 [2022-01-31 21:25:02,504 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:25:02,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:02,505 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:02,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:25:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2022-01-31 21:25:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-01-31 21:25:02,809 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 72 [2022-01-31 21:25:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:02,809 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-01-31 21:25:02,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-01-31 21:25:02,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:02,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:02,809 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:02,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438 [2022-01-31 21:25:02,810 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:02,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1701271765, now seen corresponding path program 437 times [2022-01-31 21:25:02,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:02,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816100902] [2022-01-31 21:25:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:02,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:02,811 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:02,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:02,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:03,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:03,222 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:03,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816100902] [2022-01-31 21:25:03,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [816100902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:03,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:03,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:03,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624179695] [2022-01-31 21:25:03,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:03,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:03,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:03,223 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:04,301 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:25:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:04,301 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:04,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:04,301 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:25:04,301 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:25:04,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:04,302 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:04,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:25:04,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 197. [2022-01-31 21:25:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-01-31 21:25:04,617 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 72 [2022-01-31 21:25:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:04,617 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-01-31 21:25:04,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:04,617 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-01-31 21:25:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:04,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:04,618 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:04,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439 [2022-01-31 21:25:04,618 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:04,618 INFO L85 PathProgramCache]: Analyzing trace with hash 413401173, now seen corresponding path program 438 times [2022-01-31 21:25:04,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:04,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43450536] [2022-01-31 21:25:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:04,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:04,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:04,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:04,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:05,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:05,029 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:05,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43450536] [2022-01-31 21:25:05,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [43450536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:05,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:05,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:05,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274791583] [2022-01-31 21:25:05,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:05,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:05,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:05,030 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:06,015 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:25:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:06,015 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:06,016 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:25:06,016 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:25:06,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:06,016 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:06,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:25:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 199. [2022-01-31 21:25:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-01-31 21:25:06,375 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 72 [2022-01-31 21:25:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:06,375 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-01-31 21:25:06,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-01-31 21:25:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:06,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:06,375 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:06,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440 [2022-01-31 21:25:06,375 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:06,376 INFO L85 PathProgramCache]: Analyzing trace with hash -279656491, now seen corresponding path program 439 times [2022-01-31 21:25:06,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:06,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25211937] [2022-01-31 21:25:06,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:06,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:06,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:06,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:06,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:06,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:06,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:06,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25211937] [2022-01-31 21:25:06,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [25211937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:06,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:06,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:06,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387791412] [2022-01-31 21:25:06,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:06,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:06,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:06,629 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:07,737 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:25:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:07,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:07,737 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:25:07,737 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:25:07,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:07,738 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:07,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 27 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:25:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 201. [2022-01-31 21:25:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-01-31 21:25:08,067 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 72 [2022-01-31 21:25:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:08,067 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-01-31 21:25:08,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-01-31 21:25:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:08,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:08,068 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:08,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441 [2022-01-31 21:25:08,068 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:08,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:08,068 INFO L85 PathProgramCache]: Analyzing trace with hash -588140715, now seen corresponding path program 440 times [2022-01-31 21:25:08,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:08,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878369383] [2022-01-31 21:25:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:08,069 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:08,069 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:08,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:08,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:08,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:08,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:08,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878369383] [2022-01-31 21:25:08,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1878369383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:08,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:08,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:08,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939337007] [2022-01-31 21:25:08,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:08,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:08,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:08,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:08,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:08,486 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:09,449 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:25:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:09,449 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:09,449 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:25:09,449 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:25:09,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:09,450 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:09,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:25:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 203. [2022-01-31 21:25:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-01-31 21:25:09,779 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 72 [2022-01-31 21:25:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:09,779 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-01-31 21:25:09,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-01-31 21:25:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:09,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:09,780 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:09,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442 [2022-01-31 21:25:09,780 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:09,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash -688736555, now seen corresponding path program 441 times [2022-01-31 21:25:09,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:09,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175697567] [2022-01-31 21:25:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:09,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:09,781 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:09,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:09,781 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:10,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:10,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:10,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175697567] [2022-01-31 21:25:10,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1175697567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:10,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:10,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:10,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285345498] [2022-01-31 21:25:10,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:10,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:10,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:10,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:10,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:10,249 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:11,349 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:25:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:11,349 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:11,350 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:25:11,350 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:25:11,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:11,350 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:11,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:25:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 205. [2022-01-31 21:25:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-01-31 21:25:11,691 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 72 [2022-01-31 21:25:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:11,691 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-01-31 21:25:11,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-01-31 21:25:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:11,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:11,692 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:11,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443 [2022-01-31 21:25:11,692 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1422909013, now seen corresponding path program 442 times [2022-01-31 21:25:11,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289472294] [2022-01-31 21:25:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:11,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:11,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:11,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:11,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:12,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:12,108 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:12,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289472294] [2022-01-31 21:25:12,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1289472294] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:12,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:12,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:12,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285951326] [2022-01-31 21:25:12,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:12,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:12,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:12,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:12,109 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:13,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:13,322 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:25:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:13,323 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:13,323 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:25:13,323 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:25:13,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:13,324 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:13,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:25:13,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 207. [2022-01-31 21:25:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-01-31 21:25:13,705 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 72 [2022-01-31 21:25:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:13,705 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-01-31 21:25:13,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-01-31 21:25:13,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:13,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:13,706 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:13,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable444 [2022-01-31 21:25:13,706 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:13,706 INFO L85 PathProgramCache]: Analyzing trace with hash -805231147, now seen corresponding path program 443 times [2022-01-31 21:25:13,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:13,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213192545] [2022-01-31 21:25:13,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:13,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:13,707 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:13,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:13,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:14,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:14,135 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:14,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213192545] [2022-01-31 21:25:14,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [213192545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:14,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:14,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:14,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189718349] [2022-01-31 21:25:14,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:14,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:14,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:14,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:14,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:14,136 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:15,445 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:25:15,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:15,445 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:15,446 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:25:15,446 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:25:15,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:15,446 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:15,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:25:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 209. [2022-01-31 21:25:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-01-31 21:25:15,824 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 72 [2022-01-31 21:25:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:15,825 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-01-31 21:25:15,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-01-31 21:25:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:15,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:15,825 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:15,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445 [2022-01-31 21:25:15,825 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:15,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1140755797, now seen corresponding path program 444 times [2022-01-31 21:25:15,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:15,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100478311] [2022-01-31 21:25:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:15,826 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:15,826 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:15,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:15,827 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:16,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:16,255 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 21:25:16,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:16,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100478311] [2022-01-31 21:25:16,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [100478311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:16,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:16,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:16,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225204838] [2022-01-31 21:25:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:16,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:16,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:16,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:16,256 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:17,564 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:25:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:17,565 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:17,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:17,565 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:25:17,565 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:25:17,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:17,565 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:17,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:25:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 211. [2022-01-31 21:25:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-01-31 21:25:17,949 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 72 [2022-01-31 21:25:17,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:17,949 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-01-31 21:25:17,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:17,949 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-01-31 21:25:17,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:17,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:17,950 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:17,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446 [2022-01-31 21:25:17,950 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:17,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:17,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1371532075, now seen corresponding path program 445 times [2022-01-31 21:25:17,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:17,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929424016] [2022-01-31 21:25:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:17,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:17,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:17,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:17,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:18,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:18,335 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929424016] [2022-01-31 21:25:18,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929424016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:18,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:18,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:18,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139438969] [2022-01-31 21:25:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:18,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:18,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:18,336 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:19,575 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:25:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:19,575 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:19,576 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:25:19,576 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:25:19,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:19,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:19,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:25:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 213. [2022-01-31 21:25:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-01-31 21:25:19,949 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 72 [2022-01-31 21:25:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:19,950 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-01-31 21:25:19,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-01-31 21:25:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:19,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:19,950 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:19,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447 [2022-01-31 21:25:19,950 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1908556715, now seen corresponding path program 446 times [2022-01-31 21:25:19,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:19,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157279388] [2022-01-31 21:25:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:19,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:19,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:19,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:19,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:20,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:20,364 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 21:25:20,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157279388] [2022-01-31 21:25:20,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [157279388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:20,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:20,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:20,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718364873] [2022-01-31 21:25:20,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:20,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:20,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:20,365 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:21,497 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:25:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:21,498 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:25:21,498 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:25:21,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:21,498 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:21,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:25:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 215. [2022-01-31 21:25:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-01-31 21:25:21,899 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 72 [2022-01-31 21:25:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:21,899 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-01-31 21:25:21,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-01-31 21:25:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:21,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:21,899 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:21,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448 [2022-01-31 21:25:21,899 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:21,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1701807061, now seen corresponding path program 447 times [2022-01-31 21:25:21,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:21,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282117349] [2022-01-31 21:25:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:21,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:21,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:21,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:21,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:22,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:22,206 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:22,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282117349] [2022-01-31 21:25:22,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [282117349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:22,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:22,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:22,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7144916] [2022-01-31 21:25:22,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:22,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:22,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:22,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:22,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:22,207 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:23,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:23,437 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:25:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:23,438 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:25:23,438 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:25:23,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:23,438 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:23,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:25:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 217. [2022-01-31 21:25:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-01-31 21:25:23,854 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 72 [2022-01-31 21:25:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:23,855 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-01-31 21:25:23,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-01-31 21:25:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:23,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:23,855 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:23,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449 [2022-01-31 21:25:23,855 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash 927820629, now seen corresponding path program 448 times [2022-01-31 21:25:23,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512274242] [2022-01-31 21:25:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:23,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:23,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:23,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:23,857 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:24,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:24,263 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512274242] [2022-01-31 21:25:24,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [512274242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:24,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:24,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:24,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113940168] [2022-01-31 21:25:24,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:24,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:24,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:24,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:24,264 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:25,537 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:25:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:25,537 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:25:25,537 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:25:25,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:25,538 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:25,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:25:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 219. [2022-01-31 21:25:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-01-31 21:25:25,971 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 72 [2022-01-31 21:25:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:25,971 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-01-31 21:25:25,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-01-31 21:25:25,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:25,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:25,971 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:25,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450 [2022-01-31 21:25:25,971 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash 156201685, now seen corresponding path program 449 times [2022-01-31 21:25:25,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:25,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113768044] [2022-01-31 21:25:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:25,973 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:25,973 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:25,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:25,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:26,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:26,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:26,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113768044] [2022-01-31 21:25:26,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113768044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:26,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:26,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:26,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870183262] [2022-01-31 21:25:26,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:26,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:26,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:26,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:26,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:26,409 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:27,817 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:25:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:27,817 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:27,818 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:25:27,818 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:25:27,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:27,841 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:27,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:25:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 221. [2022-01-31 21:25:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-01-31 21:25:28,269 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 72 [2022-01-31 21:25:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:28,269 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-01-31 21:25:28,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-01-31 21:25:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:28,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:28,269 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:28,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451 [2022-01-31 21:25:28,270 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1659738709, now seen corresponding path program 450 times [2022-01-31 21:25:28,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:28,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176624459] [2022-01-31 21:25:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:28,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:28,271 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:28,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:28,271 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:28,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:28,702 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:28,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176624459] [2022-01-31 21:25:28,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [176624459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:28,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:28,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:28,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917173120] [2022-01-31 21:25:28,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:28,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:28,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:28,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:28,703 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:30,114 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:25:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:30,114 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:30,114 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:25:30,114 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:25:30,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:30,115 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:30,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:25:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 223. [2022-01-31 21:25:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-01-31 21:25:30,544 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 72 [2022-01-31 21:25:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:30,544 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-01-31 21:25:30,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:30,545 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-01-31 21:25:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:30,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:30,545 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:30,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452 [2022-01-31 21:25:30,545 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash -845159979, now seen corresponding path program 451 times [2022-01-31 21:25:30,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:30,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011247263] [2022-01-31 21:25:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:30,546 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:30,546 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:30,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:30,547 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:30,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:30,979 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:30,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011247263] [2022-01-31 21:25:30,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011247263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:30,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:30,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:30,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227172663] [2022-01-31 21:25:30,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:30,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:30,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:30,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:30,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:30,980 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:32,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:32,212 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:25:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:32,212 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:32,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:32,213 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:25:32,213 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:25:32,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:32,213 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:32,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:25:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 225. [2022-01-31 21:25:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-01-31 21:25:32,646 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 72 [2022-01-31 21:25:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:32,646 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-01-31 21:25:32,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-01-31 21:25:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:32,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:32,646 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:32,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453 [2022-01-31 21:25:32,646 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:32,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1423853909, now seen corresponding path program 452 times [2022-01-31 21:25:32,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:32,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994755021] [2022-01-31 21:25:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:32,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:32,648 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:32,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:32,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:33,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:33,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:33,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994755021] [2022-01-31 21:25:33,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994755021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:33,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:33,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:33,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658465003] [2022-01-31 21:25:33,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:33,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:33,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:33,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:33,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:33,061 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:34,362 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-01-31 21:25:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:34,363 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:34,363 INFO L225 Difference]: With dead ends: 302 [2022-01-31 21:25:34,363 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:25:34,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:34,364 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:34,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:25:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 227. [2022-01-31 21:25:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-01-31 21:25:34,800 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 72 [2022-01-31 21:25:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:34,800 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-01-31 21:25:34,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-01-31 21:25:34,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:34,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:34,801 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:34,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454 [2022-01-31 21:25:34,801 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:34,801 INFO L85 PathProgramCache]: Analyzing trace with hash 102813909, now seen corresponding path program 453 times [2022-01-31 21:25:34,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:34,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496568022] [2022-01-31 21:25:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:34,802 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:34,802 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:34,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:34,802 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:35,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:35,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:35,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496568022] [2022-01-31 21:25:35,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1496568022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:35,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:35,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:35,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868605289] [2022-01-31 21:25:35,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:35,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:35,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:35,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:35,234 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:36,797 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-01-31 21:25:36,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:36,797 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:36,798 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:25:36,798 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:25:36,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:36,798 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:36,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:25:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 229. [2022-01-31 21:25:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-01-31 21:25:37,272 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 72 [2022-01-31 21:25:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:37,272 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-01-31 21:25:37,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-01-31 21:25:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:37,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:37,273 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:37,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable455 [2022-01-31 21:25:37,273 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1893693525, now seen corresponding path program 454 times [2022-01-31 21:25:37,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:37,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718446690] [2022-01-31 21:25:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:37,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:37,274 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:37,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:37,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:37,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:37,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:37,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718446690] [2022-01-31 21:25:37,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1718446690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:37,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:37,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:37,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642535493] [2022-01-31 21:25:37,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:37,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:37,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:37,701 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:39,007 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-01-31 21:25:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:39,007 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:39,008 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:25:39,008 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:25:39,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:39,008 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:39,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 27 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:25:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 231. [2022-01-31 21:25:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-01-31 21:25:39,474 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 72 [2022-01-31 21:25:39,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:39,474 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-01-31 21:25:39,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-01-31 21:25:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:39,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:39,474 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:39,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456 [2022-01-31 21:25:39,474 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:39,475 INFO L85 PathProgramCache]: Analyzing trace with hash 647118805, now seen corresponding path program 455 times [2022-01-31 21:25:39,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:39,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959487789] [2022-01-31 21:25:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:39,475 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:39,476 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:39,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:39,476 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:39,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:39,725 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:39,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959487789] [2022-01-31 21:25:39,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [959487789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:39,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:39,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:39,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213308967] [2022-01-31 21:25:39,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:39,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:39,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:39,726 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:40,983 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-01-31 21:25:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:40,984 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:40,984 INFO L225 Difference]: With dead ends: 320 [2022-01-31 21:25:40,984 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:25:40,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:40,984 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:40,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:25:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 233. [2022-01-31 21:25:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-01-31 21:25:41,424 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 72 [2022-01-31 21:25:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:41,424 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-01-31 21:25:41,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-01-31 21:25:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:41,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:41,425 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:41,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457 [2022-01-31 21:25:41,425 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:41,425 INFO L85 PathProgramCache]: Analyzing trace with hash 984688469, now seen corresponding path program 456 times [2022-01-31 21:25:41,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:41,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283954022] [2022-01-31 21:25:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:41,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:41,426 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:41,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:41,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:41,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:41,737 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283954022] [2022-01-31 21:25:41,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [283954022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:41,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:41,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:41,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618579308] [2022-01-31 21:25:41,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:41,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:41,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:41,738 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:43,114 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-01-31 21:25:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:43,114 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:43,115 INFO L225 Difference]: With dead ends: 326 [2022-01-31 21:25:43,115 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:25:43,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:43,115 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:43,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:25:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 235. [2022-01-31 21:25:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-01-31 21:25:43,567 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 72 [2022-01-31 21:25:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:43,567 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-01-31 21:25:43,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-01-31 21:25:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:43,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:43,568 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:43,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458 [2022-01-31 21:25:43,568 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1028378923, now seen corresponding path program 457 times [2022-01-31 21:25:43,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:43,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053995650] [2022-01-31 21:25:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:43,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:43,569 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:43,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:43,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:43,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:43,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:43,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053995650] [2022-01-31 21:25:43,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1053995650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:43,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:43,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:43,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823281440] [2022-01-31 21:25:43,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:43,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:43,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:43,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:43,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:43,984 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:45,450 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-01-31 21:25:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:45,450 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:45,450 INFO L225 Difference]: With dead ends: 332 [2022-01-31 21:25:45,450 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 21:25:45,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:45,451 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:45,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 21:25:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 237. [2022-01-31 21:25:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-01-31 21:25:45,937 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 72 [2022-01-31 21:25:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:45,937 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-01-31 21:25:45,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:45,937 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-01-31 21:25:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:45,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:45,938 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:45,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459 [2022-01-31 21:25:45,938 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:45,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1444107861, now seen corresponding path program 458 times [2022-01-31 21:25:45,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:45,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893730154] [2022-01-31 21:25:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:45,939 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:45,939 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:45,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:45,940 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:46,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:46,317 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 21:25:46,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:46,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893730154] [2022-01-31 21:25:46,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [893730154] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:46,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:46,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:46,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847170966] [2022-01-31 21:25:46,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:46,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:46,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:46,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:46,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:46,318 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:47,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:47,672 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-01-31 21:25:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:47,672 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:47,672 INFO L225 Difference]: With dead ends: 338 [2022-01-31 21:25:47,673 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 21:25:47,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:47,673 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:47,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:47,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 21:25:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 239. [2022-01-31 21:25:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-01-31 21:25:48,125 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 72 [2022-01-31 21:25:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:48,126 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-01-31 21:25:48,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-01-31 21:25:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:48,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:48,126 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:48,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460 [2022-01-31 21:25:48,126 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1907974699, now seen corresponding path program 459 times [2022-01-31 21:25:48,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:48,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883776698] [2022-01-31 21:25:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:48,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:48,127 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:48,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:48,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:48,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:48,543 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:48,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883776698] [2022-01-31 21:25:48,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [883776698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:48,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:48,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:48,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488554856] [2022-01-31 21:25:48,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:48,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:48,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:48,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:48,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:48,544 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:50,091 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-01-31 21:25:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:50,092 INFO L225 Difference]: With dead ends: 344 [2022-01-31 21:25:50,092 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 21:25:50,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:50,092 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:50,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 21:25:50,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 241. [2022-01-31 21:25:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-01-31 21:25:50,574 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 72 [2022-01-31 21:25:50,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:50,574 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-01-31 21:25:50,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:50,574 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-01-31 21:25:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:50,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:50,575 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:50,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461 [2022-01-31 21:25:50,575 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:50,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2033842859, now seen corresponding path program 460 times [2022-01-31 21:25:50,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:50,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616430812] [2022-01-31 21:25:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:50,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:50,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:50,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:50,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:51,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:51,014 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:51,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616430812] [2022-01-31 21:25:51,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [616430812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:51,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:51,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:51,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628076953] [2022-01-31 21:25:51,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:51,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:51,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:51,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:51,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:51,015 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:52,462 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-01-31 21:25:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:52,462 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:52,463 INFO L225 Difference]: With dead ends: 350 [2022-01-31 21:25:52,463 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 21:25:52,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:52,463 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:52,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 21:25:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 243. [2022-01-31 21:25:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-01-31 21:25:52,949 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 72 [2022-01-31 21:25:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:52,949 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-01-31 21:25:52,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-01-31 21:25:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:52,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:52,950 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:52,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462 [2022-01-31 21:25:52,950 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:52,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:52,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1560906965, now seen corresponding path program 461 times [2022-01-31 21:25:52,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:52,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862707113] [2022-01-31 21:25:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:52,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:52,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:52,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:52,951 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:53,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:53,340 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862707113] [2022-01-31 21:25:53,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1862707113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:53,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:53,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:53,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761708358] [2022-01-31 21:25:53,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:53,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:53,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:53,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:53,341 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:54,780 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-01-31 21:25:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:54,780 INFO L225 Difference]: With dead ends: 356 [2022-01-31 21:25:54,780 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 21:25:54,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:54,781 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:54,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:25:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 21:25:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 245. [2022-01-31 21:25:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-01-31 21:25:55,257 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 72 [2022-01-31 21:25:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:55,257 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-01-31 21:25:55,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-01-31 21:25:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:55,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:55,258 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:55,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463 [2022-01-31 21:25:55,258 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:55,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:55,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1333185451, now seen corresponding path program 462 times [2022-01-31 21:25:55,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:55,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674013724] [2022-01-31 21:25:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:55,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:55,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:55,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:55,260 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:55,635 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:55,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674013724] [2022-01-31 21:25:55,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [674013724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:55,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:55,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:55,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279035339] [2022-01-31 21:25:55,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:55,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:55,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:55,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:55,636 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:57,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:57,203 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-01-31 21:25:57,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:57,203 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:57,204 INFO L225 Difference]: With dead ends: 362 [2022-01-31 21:25:57,204 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 21:25:57,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:57,204 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:57,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 29 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 21:25:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 247. [2022-01-31 21:25:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-01-31 21:25:57,665 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 72 [2022-01-31 21:25:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:25:57,665 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-01-31 21:25:57,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-01-31 21:25:57,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:25:57,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:25:57,666 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:25:57,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464 [2022-01-31 21:25:57,666 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:25:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:25:57,666 INFO L85 PathProgramCache]: Analyzing trace with hash 582810581, now seen corresponding path program 463 times [2022-01-31 21:25:57,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:25:57,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333867206] [2022-01-31 21:25:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:25:57,667 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:25:57,667 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:25:57,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:25:57,667 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:25:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:58,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:25:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:25:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:25:58,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:25:58,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333867206] [2022-01-31 21:25:58,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333867206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:25:58,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:25:58,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:25:58,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230568378] [2022-01-31 21:25:58,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:25:58,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:25:58,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:25:58,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:25:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:25:58,017 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:25:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:25:59,577 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-01-31 21:25:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:25:59,577 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:25:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:25:59,578 INFO L225 Difference]: With dead ends: 368 [2022-01-31 21:25:59,578 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 21:25:59,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:25:59,579 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:25:59,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:25:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 21:26:00,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2022-01-31 21:26:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-01-31 21:26:00,079 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 72 [2022-01-31 21:26:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:00,080 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-01-31 21:26:00,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-01-31 21:26:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:26:00,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:00,080 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:00,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465 [2022-01-31 21:26:00,080 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:00,080 INFO L85 PathProgramCache]: Analyzing trace with hash -685972651, now seen corresponding path program 464 times [2022-01-31 21:26:00,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:00,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479084016] [2022-01-31 21:26:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:00,081 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:00,081 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:00,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:00,082 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:00,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:00,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:00,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479084016] [2022-01-31 21:26:00,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [479084016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:00,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:00,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:26:00,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065940573] [2022-01-31 21:26:00,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:00,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:26:00,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:00,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:26:00,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:26:00,510 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:01,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:01,710 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-01-31 21:26:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:26:01,710 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:26:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:01,711 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:26:01,711 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:26:01,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:26:01,711 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:01,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:26:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 193. [2022-01-31 21:26:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-01-31 21:26:02,064 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 72 [2022-01-31 21:26:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:02,064 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-01-31 21:26:02,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-01-31 21:26:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:02,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:02,064 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:02,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable466 [2022-01-31 21:26:02,065 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1545292280, now seen corresponding path program 465 times [2022-01-31 21:26:02,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781750123] [2022-01-31 21:26:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:02,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:02,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:02,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:02,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:02,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:02,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:02,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781750123] [2022-01-31 21:26:02,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [781750123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:02,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:02,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:02,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704066756] [2022-01-31 21:26:02,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:02,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:02,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:02,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:02,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:02,328 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:03,271 INFO L93 Difference]: Finished difference Result 208 states and 303 transitions. [2022-01-31 21:26:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:03,271 INFO L225 Difference]: With dead ends: 208 [2022-01-31 21:26:03,271 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 21:26:03,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:03,272 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:03,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 21 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 21:26:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2022-01-31 21:26:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-01-31 21:26:03,609 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 74 [2022-01-31 21:26:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:03,609 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-01-31 21:26:03,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-01-31 21:26:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:03,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:03,609 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:03,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467 [2022-01-31 21:26:03,609 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash 450343288, now seen corresponding path program 466 times [2022-01-31 21:26:03,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:03,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359053151] [2022-01-31 21:26:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:03,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:03,611 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:03,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:03,611 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:04,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:04,080 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 21:26:04,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:04,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359053151] [2022-01-31 21:26:04,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1359053151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:04,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:04,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:04,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286327143] [2022-01-31 21:26:04,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:04,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:04,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:04,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:04,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:04,081 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:05,050 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-01-31 21:26:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:05,051 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:05,051 INFO L225 Difference]: With dead ends: 212 [2022-01-31 21:26:05,051 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:26:05,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:05,052 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:05,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:26:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 201. [2022-01-31 21:26:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-01-31 21:26:05,409 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 74 [2022-01-31 21:26:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:05,409 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-01-31 21:26:05,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-01-31 21:26:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:05,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:05,410 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:05,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468 [2022-01-31 21:26:05,410 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:05,410 INFO L85 PathProgramCache]: Analyzing trace with hash 471349496, now seen corresponding path program 467 times [2022-01-31 21:26:05,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:05,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804897445] [2022-01-31 21:26:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:05,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:05,411 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:05,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:05,411 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:05,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:05,685 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:05,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804897445] [2022-01-31 21:26:05,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1804897445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:05,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:05,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:05,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744500880] [2022-01-31 21:26:05,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:05,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:05,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:05,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:05,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:05,686 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:06,673 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:26:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:06,674 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:26:06,674 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:26:06,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:06,674 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:06,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:26:07,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 203. [2022-01-31 21:26:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-01-31 21:26:07,048 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 74 [2022-01-31 21:26:07,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:07,048 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-01-31 21:26:07,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-01-31 21:26:07,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:07,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:07,049 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:07,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469 [2022-01-31 21:26:07,049 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:07,049 INFO L85 PathProgramCache]: Analyzing trace with hash -816521096, now seen corresponding path program 468 times [2022-01-31 21:26:07,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:07,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138637328] [2022-01-31 21:26:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:07,050 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:07,050 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:07,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:07,050 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:07,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:07,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:07,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138637328] [2022-01-31 21:26:07,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2138637328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:07,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:07,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:07,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044856270] [2022-01-31 21:26:07,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:07,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:07,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:07,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:07,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:07,319 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:08,270 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:26:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:08,270 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:08,270 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:26:08,270 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:26:08,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:08,271 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:08,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:26:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 205. [2022-01-31 21:26:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-01-31 21:26:08,644 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 74 [2022-01-31 21:26:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:08,644 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-01-31 21:26:08,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-01-31 21:26:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:08,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:08,644 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:08,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470 [2022-01-31 21:26:08,645 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:08,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1509578760, now seen corresponding path program 469 times [2022-01-31 21:26:08,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:08,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334979155] [2022-01-31 21:26:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:08,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:08,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:08,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:08,646 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:08,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:08,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:08,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334979155] [2022-01-31 21:26:08,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1334979155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:08,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:08,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:08,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777928533] [2022-01-31 21:26:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:08,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:08,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:08,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:08,917 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:09,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:09,982 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:26:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:09,983 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:09,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:09,983 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:26:09,983 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:26:09,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:09,983 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:09,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:26:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 207. [2022-01-31 21:26:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-01-31 21:26:10,355 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 74 [2022-01-31 21:26:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:10,355 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-01-31 21:26:10,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-01-31 21:26:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:10,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:10,355 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:10,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471 [2022-01-31 21:26:10,355 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1818062984, now seen corresponding path program 470 times [2022-01-31 21:26:10,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:10,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233707899] [2022-01-31 21:26:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:10,356 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:10,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:10,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:10,357 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:10,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:10,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:10,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233707899] [2022-01-31 21:26:10,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1233707899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:10,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:10,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:10,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775722847] [2022-01-31 21:26:10,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:10,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:10,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:10,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:10,794 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:11,883 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:26:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:11,883 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:11,883 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:26:11,883 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:26:11,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:11,884 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:11,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:26:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 209. [2022-01-31 21:26:12,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-01-31 21:26:12,287 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 74 [2022-01-31 21:26:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:12,287 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-01-31 21:26:12,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-01-31 21:26:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:12,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:12,288 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:12,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472 [2022-01-31 21:26:12,288 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:12,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:12,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1918658824, now seen corresponding path program 471 times [2022-01-31 21:26:12,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:12,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359934242] [2022-01-31 21:26:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:12,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:12,289 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:12,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:12,289 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:12,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:12,743 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:12,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359934242] [2022-01-31 21:26:12,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1359934242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:12,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:12,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:12,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808703356] [2022-01-31 21:26:12,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:12,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:12,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:12,744 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:13,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:13,955 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:26:13,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:13,955 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:13,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:13,956 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:26:13,956 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:26:13,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:13,956 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:13,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:26:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 211. [2022-01-31 21:26:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-01-31 21:26:14,350 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 74 [2022-01-31 21:26:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:14,350 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-01-31 21:26:14,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-01-31 21:26:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:14,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:14,350 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:14,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473 [2022-01-31 21:26:14,350 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash 192986744, now seen corresponding path program 472 times [2022-01-31 21:26:14,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:14,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381731266] [2022-01-31 21:26:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:14,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:14,352 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:14,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:14,352 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:14,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:14,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:14,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381731266] [2022-01-31 21:26:14,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381731266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:14,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:14,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:14,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923978651] [2022-01-31 21:26:14,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:14,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:14,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:14,834 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:16,035 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:26:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:16,036 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:26:16,036 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:26:16,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:16,036 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:16,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:16,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:26:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 213. [2022-01-31 21:26:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-01-31 21:26:16,444 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 74 [2022-01-31 21:26:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:16,444 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-01-31 21:26:16,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-01-31 21:26:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:16,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:16,444 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:16,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474 [2022-01-31 21:26:16,445 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2035153416, now seen corresponding path program 473 times [2022-01-31 21:26:16,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:16,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13706347] [2022-01-31 21:26:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:16,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:16,446 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:16,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:16,446 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:16,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:16,810 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 21:26:16,810 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:16,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13706347] [2022-01-31 21:26:16,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [13706347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:16,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:16,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:16,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915070937] [2022-01-31 21:26:16,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:16,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:16,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:16,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:16,811 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:17,888 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:26:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:17,888 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:17,889 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:26:17,889 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:26:17,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:17,889 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:17,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 25 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:26:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 215. [2022-01-31 21:26:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-01-31 21:26:18,269 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 74 [2022-01-31 21:26:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:18,269 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-01-31 21:26:18,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-01-31 21:26:18,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:18,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:18,270 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:18,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475 [2022-01-31 21:26:18,270 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:18,270 INFO L85 PathProgramCache]: Analyzing trace with hash -89166472, now seen corresponding path program 474 times [2022-01-31 21:26:18,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:18,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243290211] [2022-01-31 21:26:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:18,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:18,271 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:18,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:18,272 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:18,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:18,713 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:18,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243290211] [2022-01-31 21:26:18,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [243290211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:18,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:18,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:18,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030730487] [2022-01-31 21:26:18,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:18,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:18,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:18,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:18,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:18,714 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:19,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:19,997 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:26:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:19,997 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:19,998 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:26:19,998 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:26:19,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:19,998 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:19,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:19,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:26:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2022-01-31 21:26:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-01-31 21:26:20,397 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 74 [2022-01-31 21:26:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:20,397 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-01-31 21:26:20,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-01-31 21:26:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:20,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:20,397 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:20,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable476 [2022-01-31 21:26:20,397 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:20,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1693512952, now seen corresponding path program 475 times [2022-01-31 21:26:20,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:20,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756297785] [2022-01-31 21:26:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:20,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:20,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:20,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:20,399 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:20,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:20,840 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 21:26:20,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:20,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756297785] [2022-01-31 21:26:20,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [756297785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:20,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:20,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:20,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220800130] [2022-01-31 21:26:20,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:20,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:20,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:20,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:20,842 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:22,030 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:26:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:22,030 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:22,031 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:26:22,031 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:26:22,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:22,032 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:22,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 25 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:26:22,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 219. [2022-01-31 21:26:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-01-31 21:26:22,447 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 74 [2022-01-31 21:26:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:22,447 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-01-31 21:26:22,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-01-31 21:26:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:22,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:22,447 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:22,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477 [2022-01-31 21:26:22,447 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1156488312, now seen corresponding path program 476 times [2022-01-31 21:26:22,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:22,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333860132] [2022-01-31 21:26:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:22,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:22,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:22,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:22,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:22,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:22,852 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:22,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333860132] [2022-01-31 21:26:22,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333860132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:22,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:22,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:22,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083113122] [2022-01-31 21:26:22,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:22,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:22,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:22,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:22,853 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:24,164 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:26:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:24,165 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:24,165 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:26:24,165 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:26:24,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:24,165 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:24,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 31 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:26:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 221. [2022-01-31 21:26:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-01-31 21:26:24,576 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 74 [2022-01-31 21:26:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:24,577 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-01-31 21:26:24,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:24,577 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-01-31 21:26:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:24,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:24,577 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:24,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478 [2022-01-31 21:26:24,577 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:24,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:24,577 INFO L85 PathProgramCache]: Analyzing trace with hash 471884792, now seen corresponding path program 477 times [2022-01-31 21:26:24,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:24,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446933989] [2022-01-31 21:26:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:24,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:24,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:24,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:24,580 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:24,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:24,942 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 21:26:24,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:24,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446933989] [2022-01-31 21:26:24,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1446933989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:24,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:24,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:24,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208494128] [2022-01-31 21:26:24,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:24,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:24,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:24,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:24,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:24,944 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:26,306 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:26:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:26,306 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:26:26,306 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:26:26,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:26,312 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:26,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:26:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 223. [2022-01-31 21:26:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-01-31 21:26:26,730 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 74 [2022-01-31 21:26:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:26,730 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-01-31 21:26:26,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-01-31 21:26:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:26,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:26,731 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:26,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479 [2022-01-31 21:26:26,731 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:26,731 INFO L85 PathProgramCache]: Analyzing trace with hash -302101640, now seen corresponding path program 478 times [2022-01-31 21:26:26,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:26,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105357942] [2022-01-31 21:26:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:26,732 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:26,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:26,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:26,733 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:27,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:27,179 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 21:26:27,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:27,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105357942] [2022-01-31 21:26:27,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2105357942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:27,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:27,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:27,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912769738] [2022-01-31 21:26:27,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:27,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:27,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:27,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:27,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:27,180 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:28,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:28,574 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:26:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:28,575 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:28,575 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:26:28,575 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:26:28,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:28,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:28,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:26:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 225. [2022-01-31 21:26:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-01-31 21:26:29,002 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 74 [2022-01-31 21:26:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:29,002 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-01-31 21:26:29,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-01-31 21:26:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:29,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:29,003 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:29,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480 [2022-01-31 21:26:29,003 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:29,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1073720584, now seen corresponding path program 479 times [2022-01-31 21:26:29,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:29,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984548276] [2022-01-31 21:26:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:29,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:29,004 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:29,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:29,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:29,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:29,441 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 21:26:29,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:29,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984548276] [2022-01-31 21:26:29,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [984548276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:29,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:29,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:29,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862616179] [2022-01-31 21:26:29,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:29,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:29,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:29,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:29,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:29,442 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:30,876 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:26:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:30,877 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:30,877 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:26:30,877 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:26:30,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:30,877 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:30,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:26:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2022-01-31 21:26:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-01-31 21:26:31,343 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 74 [2022-01-31 21:26:31,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:31,343 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-01-31 21:26:31,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:31,344 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-01-31 21:26:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:31,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:31,344 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:31,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481 [2022-01-31 21:26:31,344 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:31,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash 429816440, now seen corresponding path program 480 times [2022-01-31 21:26:31,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:31,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833345936] [2022-01-31 21:26:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:31,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:31,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:31,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:31,346 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:31,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:31,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:31,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833345936] [2022-01-31 21:26:31,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833345936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:31,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:31,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:31,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088249246] [2022-01-31 21:26:31,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:31,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:31,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:31,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:31,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:31,775 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:33,315 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:26:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:33,315 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:26:33,315 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:26:33,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:33,316 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:33,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:26:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 229. [2022-01-31 21:26:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-01-31 21:26:33,800 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 74 [2022-01-31 21:26:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:33,800 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-01-31 21:26:33,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:33,801 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-01-31 21:26:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:33,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:33,801 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:33,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482 [2022-01-31 21:26:33,801 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2075082248, now seen corresponding path program 481 times [2022-01-31 21:26:33,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:33,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212729779] [2022-01-31 21:26:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:33,802 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:33,802 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:33,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:33,803 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:34,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:34,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:34,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212729779] [2022-01-31 21:26:34,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [212729779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:34,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:34,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:34,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572446115] [2022-01-31 21:26:34,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:34,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:34,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:34,256 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:35,780 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-01-31 21:26:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:35,781 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:35,781 INFO L225 Difference]: With dead ends: 302 [2022-01-31 21:26:35,781 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:26:35,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:35,781 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:35,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:35,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:26:36,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 231. [2022-01-31 21:26:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-01-31 21:26:36,287 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 74 [2022-01-31 21:26:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:36,287 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-01-31 21:26:36,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-01-31 21:26:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:36,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:36,288 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:36,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483 [2022-01-31 21:26:36,288 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash 193931640, now seen corresponding path program 482 times [2022-01-31 21:26:36,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:36,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42777090] [2022-01-31 21:26:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:36,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:36,289 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:36,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:36,289 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:36,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:36,743 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:36,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42777090] [2022-01-31 21:26:36,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [42777090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:36,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:36,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:36,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104851022] [2022-01-31 21:26:36,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:36,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:36,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:36,745 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:38,319 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-01-31 21:26:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:38,319 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:38,320 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:26:38,320 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:26:38,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:38,320 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:38,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:38,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:26:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 233. [2022-01-31 21:26:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-01-31 21:26:38,814 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 74 [2022-01-31 21:26:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:38,814 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-01-31 21:26:38,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-01-31 21:26:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:38,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:38,814 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:38,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484 [2022-01-31 21:26:38,815 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:38,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1127108360, now seen corresponding path program 483 times [2022-01-31 21:26:38,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:38,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311927947] [2022-01-31 21:26:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:38,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:38,816 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:38,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:38,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:39,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:39,274 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 21:26:39,274 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:39,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311927947] [2022-01-31 21:26:39,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1311927947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:39,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:39,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:39,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833484132] [2022-01-31 21:26:39,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:39,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:39,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:39,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:39,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:39,275 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:40,666 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-01-31 21:26:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:40,666 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:40,667 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:26:40,667 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:26:40,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:40,667 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:40,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:26:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2022-01-31 21:26:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-01-31 21:26:41,154 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 74 [2022-01-31 21:26:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:41,155 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-01-31 21:26:41,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-01-31 21:26:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:41,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:41,155 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:41,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485 [2022-01-31 21:26:41,155 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:41,155 INFO L85 PathProgramCache]: Analyzing trace with hash 663771256, now seen corresponding path program 484 times [2022-01-31 21:26:41,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:41,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605142861] [2022-01-31 21:26:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:41,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:41,156 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:41,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:41,157 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:41,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:41,545 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:41,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605142861] [2022-01-31 21:26:41,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1605142861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:41,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:41,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:41,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573992301] [2022-01-31 21:26:41,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:41,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:41,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:41,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:41,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:41,546 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:43,163 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-01-31 21:26:43,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:43,164 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:43,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:43,164 INFO L225 Difference]: With dead ends: 320 [2022-01-31 21:26:43,164 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:26:43,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:43,165 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:43,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 17 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:26:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 237. [2022-01-31 21:26:43,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-01-31 21:26:43,696 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 74 [2022-01-31 21:26:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:43,696 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-01-31 21:26:43,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-01-31 21:26:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:43,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:43,696 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:43,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486 [2022-01-31 21:26:43,697 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:43,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:43,697 INFO L85 PathProgramCache]: Analyzing trace with hash -582803464, now seen corresponding path program 485 times [2022-01-31 21:26:43,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:43,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553606918] [2022-01-31 21:26:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:43,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:43,698 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:43,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:43,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:44,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:44,150 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:44,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553606918] [2022-01-31 21:26:44,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1553606918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:44,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:44,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:44,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312901156] [2022-01-31 21:26:44,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:44,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:44,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:44,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:44,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:44,152 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:45,660 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-01-31 21:26:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:45,660 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:45,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:45,661 INFO L225 Difference]: With dead ends: 326 [2022-01-31 21:26:45,661 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:26:45,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:45,661 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:45,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:26:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 239. [2022-01-31 21:26:46,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-01-31 21:26:46,144 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 74 [2022-01-31 21:26:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:46,144 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-01-31 21:26:46,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-01-31 21:26:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:46,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:46,145 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:46,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487 [2022-01-31 21:26:46,145 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash -245233800, now seen corresponding path program 486 times [2022-01-31 21:26:46,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:46,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216885944] [2022-01-31 21:26:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:46,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:46,146 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:46,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:46,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:46,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:46,577 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 21:26:46,577 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:46,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216885944] [2022-01-31 21:26:46,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216885944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:46,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:46,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:46,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534295387] [2022-01-31 21:26:46,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:46,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:46,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:46,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:46,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:46,578 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:48,116 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-01-31 21:26:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:48,117 INFO L225 Difference]: With dead ends: 332 [2022-01-31 21:26:48,117 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 21:26:48,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:48,117 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:48,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 21:26:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 241. [2022-01-31 21:26:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-01-31 21:26:48,611 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 74 [2022-01-31 21:26:48,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:48,611 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-01-31 21:26:48,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-01-31 21:26:48,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:48,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:48,612 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:48,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable488 [2022-01-31 21:26:48,612 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2036666104, now seen corresponding path program 487 times [2022-01-31 21:26:48,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:48,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740643] [2022-01-31 21:26:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:48,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:48,613 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:48,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:48,614 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:49,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:49,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740643] [2022-01-31 21:26:49,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:49,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:49,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:49,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794864871] [2022-01-31 21:26:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:49,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:49,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:49,056 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:50,534 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-01-31 21:26:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:50,534 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:50,534 INFO L225 Difference]: With dead ends: 338 [2022-01-31 21:26:50,534 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 21:26:50,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:50,535 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:50,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 21:26:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 243. [2022-01-31 21:26:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-01-31 21:26:51,047 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 74 [2022-01-31 21:26:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:51,047 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-01-31 21:26:51,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-01-31 21:26:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:51,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:51,048 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:51,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489 [2022-01-31 21:26:51,048 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:51,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:51,048 INFO L85 PathProgramCache]: Analyzing trace with hash 214185592, now seen corresponding path program 488 times [2022-01-31 21:26:51,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:51,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31066621] [2022-01-31 21:26:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:51,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:51,049 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:51,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:51,050 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:51,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:51,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:51,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31066621] [2022-01-31 21:26:51,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [31066621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:51,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:51,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:51,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790341102] [2022-01-31 21:26:51,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:51,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:51,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:51,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:51,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:51,432 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:52,973 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-01-31 21:26:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:52,973 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:52,974 INFO L225 Difference]: With dead ends: 344 [2022-01-31 21:26:52,974 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 21:26:52,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:52,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:52,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:26:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 21:26:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 245. [2022-01-31 21:26:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-01-31 21:26:53,488 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 74 [2022-01-31 21:26:53,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:53,488 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-01-31 21:26:53,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-01-31 21:26:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:53,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:53,489 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:53,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490 [2022-01-31 21:26:53,489 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1157070328, now seen corresponding path program 489 times [2022-01-31 21:26:53,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:53,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95709608] [2022-01-31 21:26:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:53,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:53,490 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:53,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:53,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:53,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:53,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:53,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95709608] [2022-01-31 21:26:53,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [95709608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:53,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:53,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:53,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971625850] [2022-01-31 21:26:53,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:53,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:53,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:53,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:53,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:53,857 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:55,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:55,501 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-01-31 21:26:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:55,501 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:55,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:55,502 INFO L225 Difference]: With dead ends: 350 [2022-01-31 21:26:55,502 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 21:26:55,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:55,502 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:55,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 21:26:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 247. [2022-01-31 21:26:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-01-31 21:26:56,036 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 74 [2022-01-31 21:26:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:56,037 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-01-31 21:26:56,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-01-31 21:26:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:56,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:56,037 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:56,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491 [2022-01-31 21:26:56,037 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1031202168, now seen corresponding path program 490 times [2022-01-31 21:26:56,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:56,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456728504] [2022-01-31 21:26:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:56,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:56,038 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:56,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:56,039 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:56,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:56,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:56,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456728504] [2022-01-31 21:26:56,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1456728504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:56,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:56,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:56,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189961511] [2022-01-31 21:26:56,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:56,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:56,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:56,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:56,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:56,496 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:26:58,161 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-01-31 21:26:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:26:58,161 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:26:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:26:58,162 INFO L225 Difference]: With dead ends: 356 [2022-01-31 21:26:58,162 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 21:26:58,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:26:58,162 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:26:58,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:26:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 21:26:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 249. [2022-01-31 21:26:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-01-31 21:26:58,711 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 74 [2022-01-31 21:26:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:26:58,712 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-01-31 21:26:58,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:26:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-01-31 21:26:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:26:58,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:26:58,712 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:26:58,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492 [2022-01-31 21:26:58,712 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:26:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:26:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash 330984696, now seen corresponding path program 491 times [2022-01-31 21:26:58,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:26:58,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962377835] [2022-01-31 21:26:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:26:58,713 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:26:58,713 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:26:58,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:26:58,714 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:26:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:59,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:26:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:26:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:26:59,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:26:59,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962377835] [2022-01-31 21:26:59,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [962377835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:26:59,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:26:59,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:26:59,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853710604] [2022-01-31 21:26:59,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:26:59,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:26:59,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:26:59,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:26:59,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:26:59,164 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:00,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:00,855 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-01-31 21:27:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:27:00,855 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:27:00,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:00,856 INFO L225 Difference]: With dead ends: 362 [2022-01-31 21:27:00,856 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 21:27:00,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:27:00,856 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:00,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 17 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 21:27:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 251. [2022-01-31 21:27:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.4878048780487805) internal successors, (366), 246 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 370 transitions. [2022-01-31 21:27:01,402 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 370 transitions. Word has length 74 [2022-01-31 21:27:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:01,402 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 370 transitions. [2022-01-31 21:27:01,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 370 transitions. [2022-01-31 21:27:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:27:01,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:01,402 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:01,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493 [2022-01-31 21:27:01,402 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:01,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:01,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1731859576, now seen corresponding path program 492 times [2022-01-31 21:27:01,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:01,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647277755] [2022-01-31 21:27:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:01,404 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:01,404 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:01,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:01,404 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:01,865 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:01,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647277755] [2022-01-31 21:27:01,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1647277755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:01,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:01,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:27:01,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997306935] [2022-01-31 21:27:01,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:01,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:27:01,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:01,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:27:01,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:27:01,866 INFO L87 Difference]: Start difference. First operand 251 states and 370 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:03,576 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-01-31 21:27:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:27:03,576 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:27:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:03,577 INFO L225 Difference]: With dead ends: 368 [2022-01-31 21:27:03,577 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 21:27:03,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:27:03,577 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:03,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 21:27:04,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 253. [2022-01-31 21:27:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.4879032258064515) internal successors, (369), 248 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 373 transitions. [2022-01-31 21:27:04,119 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 373 transitions. Word has length 74 [2022-01-31 21:27:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:04,119 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 373 transitions. [2022-01-31 21:27:04,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 373 transitions. [2022-01-31 21:27:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:27:04,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:04,119 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:04,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494 [2022-01-31 21:27:04,119 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:04,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:04,120 INFO L85 PathProgramCache]: Analyzing trace with hash -647111688, now seen corresponding path program 493 times [2022-01-31 21:27:04,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:04,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804261232] [2022-01-31 21:27:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:04,121 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:04,121 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:04,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:04,121 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:04,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:04,570 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:04,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804261232] [2022-01-31 21:27:04,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [804261232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:04,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:04,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:27:04,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360917964] [2022-01-31 21:27:04,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:04,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:27:04,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:04,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:27:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:27:04,571 INFO L87 Difference]: Start difference. First operand 253 states and 373 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:06,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:06,096 INFO L93 Difference]: Finished difference Result 374 states and 551 transitions. [2022-01-31 21:27:06,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:27:06,096 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:27:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:06,097 INFO L225 Difference]: With dead ends: 374 [2022-01-31 21:27:06,097 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 21:27:06,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:27:06,097 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:06,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 21:27:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 255. [2022-01-31 21:27:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.488) internal successors, (372), 250 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 376 transitions. [2022-01-31 21:27:06,621 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 376 transitions. Word has length 74 [2022-01-31 21:27:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:06,622 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 376 transitions. [2022-01-31 21:27:06,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 376 transitions. [2022-01-31 21:27:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:27:06,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:06,622 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:06,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495 [2022-01-31 21:27:06,622 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:06,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1915894920, now seen corresponding path program 494 times [2022-01-31 21:27:06,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:06,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135190097] [2022-01-31 21:27:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:06,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:06,623 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:06,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:06,624 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:07,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:07,067 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 21:27:07,067 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:07,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135190097] [2022-01-31 21:27:07,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1135190097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:07,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:07,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:27:07,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976335639] [2022-01-31 21:27:07,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:07,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:27:07,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:07,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:27:07,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:27:07,068 INFO L87 Difference]: Start difference. First operand 255 states and 376 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:08,717 INFO L93 Difference]: Finished difference Result 380 states and 560 transitions. [2022-01-31 21:27:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:27:08,718 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:27:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:08,718 INFO L225 Difference]: With dead ends: 380 [2022-01-31 21:27:08,718 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 21:27:08,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:27:08,719 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:08,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 21:27:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 257. [2022-01-31 21:27:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 379 transitions. [2022-01-31 21:27:09,236 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 379 transitions. Word has length 74 [2022-01-31 21:27:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:09,236 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 379 transitions. [2022-01-31 21:27:09,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 379 transitions. [2022-01-31 21:27:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:27:09,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:09,236 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:09,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496 [2022-01-31 21:27:09,236 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:09,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1445868808, now seen corresponding path program 495 times [2022-01-31 21:27:09,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:09,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857912320] [2022-01-31 21:27:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:09,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:09,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:09,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:09,238 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:09,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:09,679 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:09,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857912320] [2022-01-31 21:27:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [857912320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:09,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:09,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:27:09,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773441741] [2022-01-31 21:27:09,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:09,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:27:09,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:09,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:27:09,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:27:09,680 INFO L87 Difference]: Start difference. First operand 257 states and 379 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:11,188 INFO L93 Difference]: Finished difference Result 324 states and 476 transitions. [2022-01-31 21:27:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:27:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:27:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:11,188 INFO L225 Difference]: With dead ends: 324 [2022-01-31 21:27:11,188 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 21:27:11,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:27:11,189 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:11,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 21:27:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 199. [2022-01-31 21:27:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-01-31 21:27:11,542 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 74 [2022-01-31 21:27:11,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:11,542 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-01-31 21:27:11,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:11,543 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-01-31 21:27:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:11,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:11,543 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:11,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497 [2022-01-31 21:27:11,543 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:11,543 INFO L85 PathProgramCache]: Analyzing trace with hash 705998171, now seen corresponding path program 496 times [2022-01-31 21:27:11,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:11,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638576366] [2022-01-31 21:27:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:11,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:11,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:11,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:11,544 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:12,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:12,007 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:12,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638576366] [2022-01-31 21:27:12,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1638576366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:12,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:12,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:12,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507027345] [2022-01-31 21:27:12,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:12,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:12,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:12,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:12,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:12,008 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:13,286 INFO L93 Difference]: Finished difference Result 214 states and 312 transitions. [2022-01-31 21:27:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:13,286 INFO L225 Difference]: With dead ends: 214 [2022-01-31 21:27:13,286 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 21:27:13,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:13,287 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:13,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 19 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 21:27:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2022-01-31 21:27:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-01-31 21:27:13,674 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 76 [2022-01-31 21:27:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:13,674 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-01-31 21:27:13,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-01-31 21:27:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:13,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:13,674 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:13,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498 [2022-01-31 21:27:13,674 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash -388950821, now seen corresponding path program 497 times [2022-01-31 21:27:13,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:13,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176215500] [2022-01-31 21:27:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:13,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:13,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:13,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:13,676 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:14,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:14,159 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:14,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176215500] [2022-01-31 21:27:14,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [176215500] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:14,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:14,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:14,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156843572] [2022-01-31 21:27:14,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:14,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:14,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:14,160 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:15,489 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-01-31 21:27:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:15,489 INFO L225 Difference]: With dead ends: 218 [2022-01-31 21:27:15,489 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:27:15,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:15,490 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:15,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 17 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:27:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 207. [2022-01-31 21:27:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-01-31 21:27:15,894 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 76 [2022-01-31 21:27:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:15,894 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-01-31 21:27:15,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-01-31 21:27:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:15,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:15,895 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:15,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable499 [2022-01-31 21:27:15,895 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:15,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash -367944613, now seen corresponding path program 498 times [2022-01-31 21:27:15,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:15,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216254226] [2022-01-31 21:27:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:15,896 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:15,896 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:15,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:15,897 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:16,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:16,386 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 21:27:16,386 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:16,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216254226] [2022-01-31 21:27:16,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [216254226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:16,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:16,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:16,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956292547] [2022-01-31 21:27:16,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:16,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:16,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:16,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:16,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:16,387 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:17,563 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:27:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:17,563 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:17,564 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:27:17,564 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:27:17,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:17,564 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:17,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:27:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 209. [2022-01-31 21:27:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-01-31 21:27:17,971 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 76 [2022-01-31 21:27:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:17,971 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-01-31 21:27:17,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-01-31 21:27:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:17,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:17,972 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:17,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500 [2022-01-31 21:27:17,972 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:17,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1655815205, now seen corresponding path program 499 times [2022-01-31 21:27:17,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:17,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044118452] [2022-01-31 21:27:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:17,973 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:17,973 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:17,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:17,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:18,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:18,363 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:18,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044118452] [2022-01-31 21:27:18,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044118452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:18,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:18,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:18,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446784009] [2022-01-31 21:27:18,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:18,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:18,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:18,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:18,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:18,364 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:19,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:19,622 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:27:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:19,622 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:19,623 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:27:19,623 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:27:19,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:19,623 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:19,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:27:20,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 211. [2022-01-31 21:27:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-01-31 21:27:20,042 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 76 [2022-01-31 21:27:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:20,042 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-01-31 21:27:20,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-01-31 21:27:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:20,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:20,043 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:20,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501 [2022-01-31 21:27:20,043 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1946094427, now seen corresponding path program 500 times [2022-01-31 21:27:20,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:20,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819292003] [2022-01-31 21:27:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:20,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:20,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:20,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:20,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:20,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:20,528 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:20,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819292003] [2022-01-31 21:27:20,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819292003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:20,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:20,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:20,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266396178] [2022-01-31 21:27:20,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:20,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:20,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:20,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:20,529 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:21,905 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:27:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:21,906 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:27:21,906 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:27:21,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:21,906 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:21,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:27:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 213. [2022-01-31 21:27:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-01-31 21:27:22,339 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 76 [2022-01-31 21:27:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:22,339 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-01-31 21:27:22,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-01-31 21:27:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:22,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:22,340 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:22,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502 [2022-01-31 21:27:22,340 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1637610203, now seen corresponding path program 501 times [2022-01-31 21:27:22,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:22,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820352414] [2022-01-31 21:27:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:22,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:22,341 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:22,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:22,342 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:22,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:22,788 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:22,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820352414] [2022-01-31 21:27:22,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820352414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:22,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:22,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:22,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426281310] [2022-01-31 21:27:22,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:22,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:22,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:22,789 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:24,071 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:27:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:24,072 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:24,072 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:27:24,072 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:27:24,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:24,073 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:24,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:27:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 215. [2022-01-31 21:27:24,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-01-31 21:27:24,479 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 76 [2022-01-31 21:27:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:24,480 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-01-31 21:27:24,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-01-31 21:27:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:24,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:24,480 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:24,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503 [2022-01-31 21:27:24,480 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:24,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1537014363, now seen corresponding path program 502 times [2022-01-31 21:27:24,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:24,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473672888] [2022-01-31 21:27:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:24,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:24,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:24,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:24,482 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:24,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:24,772 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:24,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473672888] [2022-01-31 21:27:24,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473672888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:24,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:24,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:24,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255433100] [2022-01-31 21:27:24,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:24,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:24,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:24,773 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:25,859 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:27:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:25,860 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:27:25,860 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:27:25,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:25,861 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:25,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 15 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:27:26,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 217. [2022-01-31 21:27:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-01-31 21:27:26,300 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 76 [2022-01-31 21:27:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:26,300 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-01-31 21:27:26,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-01-31 21:27:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:26,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:26,301 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:26,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504 [2022-01-31 21:27:26,301 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash -646307365, now seen corresponding path program 503 times [2022-01-31 21:27:26,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:26,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087423548] [2022-01-31 21:27:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:26,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:26,302 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:26,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:26,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:26,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:26,595 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:26,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087423548] [2022-01-31 21:27:26,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087423548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:26,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:26,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:26,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169798166] [2022-01-31 21:27:26,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:26,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:26,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:26,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:26,596 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:27,695 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:27:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:27,695 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:27,696 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:27:27,696 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:27:27,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:27,696 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:27,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:27:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 219. [2022-01-31 21:27:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-01-31 21:27:28,126 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 76 [2022-01-31 21:27:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:28,126 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-01-31 21:27:28,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-01-31 21:27:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:28,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:28,126 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:28,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505 [2022-01-31 21:27:28,126 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:28,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1420519771, now seen corresponding path program 504 times [2022-01-31 21:27:28,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:28,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944346827] [2022-01-31 21:27:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:28,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:28,127 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:28,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:28,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:28,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:28,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:28,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944346827] [2022-01-31 21:27:28,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1944346827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:28,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:28,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:28,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655710731] [2022-01-31 21:27:28,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:28,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:28,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:28,411 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:29,658 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:27:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:29,658 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:29,659 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:27:29,659 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:27:29,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:29,659 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:29,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:27:30,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 221. [2022-01-31 21:27:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-01-31 21:27:30,139 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 76 [2022-01-31 21:27:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:30,139 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-01-31 21:27:30,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-01-31 21:27:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:30,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:30,139 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:30,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506 [2022-01-31 21:27:30,140 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash -928460581, now seen corresponding path program 505 times [2022-01-31 21:27:30,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153464413] [2022-01-31 21:27:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:30,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:30,141 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:30,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:30,141 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:30,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:30,433 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 21:27:30,433 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:30,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153464413] [2022-01-31 21:27:30,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [153464413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:30,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:30,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:30,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134502820] [2022-01-31 21:27:30,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:30,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:30,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:30,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:30,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:30,434 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:31,784 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:27:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:31,784 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:31,785 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:27:31,785 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:27:31,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:31,785 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:31,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:27:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 223. [2022-01-31 21:27:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-01-31 21:27:32,253 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 76 [2022-01-31 21:27:32,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:32,253 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-01-31 21:27:32,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-01-31 21:27:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:32,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:32,254 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:32,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507 [2022-01-31 21:27:32,254 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:32,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash 854218843, now seen corresponding path program 506 times [2022-01-31 21:27:32,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:32,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106237527] [2022-01-31 21:27:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:32,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:32,256 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:32,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:32,256 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:32,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:32,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:32,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106237527] [2022-01-31 21:27:32,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2106237527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:32,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:32,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:32,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343229270] [2022-01-31 21:27:32,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:32,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:32,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:32,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:32,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:32,749 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:34,255 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:27:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:34,256 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:34,256 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:27:34,256 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:27:34,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:34,257 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:34,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:27:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 225. [2022-01-31 21:27:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-01-31 21:27:34,724 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 76 [2022-01-31 21:27:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:34,724 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-01-31 21:27:34,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-01-31 21:27:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:34,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:34,725 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:34,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508 [2022-01-31 21:27:34,725 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash 317194203, now seen corresponding path program 507 times [2022-01-31 21:27:34,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:34,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733658507] [2022-01-31 21:27:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:34,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:34,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:34,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:34,744 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:35,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:35,226 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:35,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733658507] [2022-01-31 21:27:35,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1733658507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:35,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:35,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:35,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838136549] [2022-01-31 21:27:35,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:35,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:35,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:35,227 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:36,764 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:27:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:36,764 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:36,765 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:27:36,765 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:27:36,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:36,765 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:36,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:27:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 227. [2022-01-31 21:27:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-01-31 21:27:37,265 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 76 [2022-01-31 21:27:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:37,265 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-01-31 21:27:37,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-01-31 21:27:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:37,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:37,266 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:37,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509 [2022-01-31 21:27:37,266 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash -367409317, now seen corresponding path program 508 times [2022-01-31 21:27:37,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:37,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685941911] [2022-01-31 21:27:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:37,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:37,275 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:37,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:37,280 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:37,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:37,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:37,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685941911] [2022-01-31 21:27:37,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [685941911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:37,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:37,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:37,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737293001] [2022-01-31 21:27:37,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:37,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:37,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:37,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:37,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:37,765 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:39,241 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:27:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:39,241 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:39,241 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:27:39,241 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:27:39,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:39,242 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:39,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:39,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:27:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 229. [2022-01-31 21:27:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-01-31 21:27:39,744 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 76 [2022-01-31 21:27:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:39,744 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-01-31 21:27:39,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-01-31 21:27:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:39,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:39,745 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:39,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable510 [2022-01-31 21:27:39,745 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1141395749, now seen corresponding path program 509 times [2022-01-31 21:27:39,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:39,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519730735] [2022-01-31 21:27:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:39,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:39,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:39,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:39,754 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:40,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:40,240 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:40,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519730735] [2022-01-31 21:27:40,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [519730735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:40,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:40,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:40,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402115245] [2022-01-31 21:27:40,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:40,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:40,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:40,242 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:41,864 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:27:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:41,864 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:41,865 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:27:41,865 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:27:41,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:41,865 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:41,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:27:42,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 231. [2022-01-31 21:27:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-01-31 21:27:42,385 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 76 [2022-01-31 21:27:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:42,385 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-01-31 21:27:42,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-01-31 21:27:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:42,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:42,386 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:42,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511 [2022-01-31 21:27:42,386 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:42,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1913014693, now seen corresponding path program 510 times [2022-01-31 21:27:42,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:42,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095378642] [2022-01-31 21:27:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:42,388 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:42,388 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:42,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:42,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:42,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:42,872 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:42,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095378642] [2022-01-31 21:27:42,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095378642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:42,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:42,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:42,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147061852] [2022-01-31 21:27:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:42,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:42,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:42,873 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:44,488 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:27:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:44,489 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:44,489 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:27:44,489 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:27:44,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:44,490 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:44,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:44,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:27:45,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 233. [2022-01-31 21:27:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-01-31 21:27:45,008 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 76 [2022-01-31 21:27:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:45,008 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-01-31 21:27:45,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-01-31 21:27:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:45,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:45,009 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:45,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512 [2022-01-31 21:27:45,009 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash -409477669, now seen corresponding path program 511 times [2022-01-31 21:27:45,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:45,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934014826] [2022-01-31 21:27:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:45,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:45,010 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:45,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:45,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:45,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:45,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:45,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934014826] [2022-01-31 21:27:45,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1934014826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:45,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:45,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:45,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027284190] [2022-01-31 21:27:45,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:45,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:45,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:45,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:45,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:45,502 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:46,937 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-01-31 21:27:46,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:46,937 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:46,938 INFO L225 Difference]: With dead ends: 302 [2022-01-31 21:27:46,938 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:27:46,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:46,938 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:46,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:27:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 235. [2022-01-31 21:27:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-01-31 21:27:47,458 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 76 [2022-01-31 21:27:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:47,458 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-01-31 21:27:47,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-01-31 21:27:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:47,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:47,459 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:47,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513 [2022-01-31 21:27:47,459 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1380590939, now seen corresponding path program 512 times [2022-01-31 21:27:47,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:47,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173322431] [2022-01-31 21:27:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:47,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:47,460 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:47,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:47,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:47,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:47,904 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 21:27:47,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:47,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173322431] [2022-01-31 21:27:47,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [173322431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:47,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:47,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:47,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419712374] [2022-01-31 21:27:47,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:47,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:47,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:47,905 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:49,339 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-01-31 21:27:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:49,339 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:49,340 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:27:49,340 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:27:49,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:49,340 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:49,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:27:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 237. [2022-01-31 21:27:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-01-31 21:27:49,837 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 76 [2022-01-31 21:27:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:49,838 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-01-31 21:27:49,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-01-31 21:27:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:49,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:49,838 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:49,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514 [2022-01-31 21:27:49,838 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:49,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:49,838 INFO L85 PathProgramCache]: Analyzing trace with hash -645362469, now seen corresponding path program 513 times [2022-01-31 21:27:49,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:49,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265244339] [2022-01-31 21:27:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:49,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:49,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:49,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:49,840 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:50,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:50,288 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:50,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265244339] [2022-01-31 21:27:50,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [265244339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:50,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:50,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:50,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548941839] [2022-01-31 21:27:50,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:50,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:50,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:50,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:50,289 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:52,023 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-01-31 21:27:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:52,023 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:52,024 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:27:52,024 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:27:52,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:52,024 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:52,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 25 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:27:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 239. [2022-01-31 21:27:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-01-31 21:27:52,565 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 76 [2022-01-31 21:27:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:52,565 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-01-31 21:27:52,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-01-31 21:27:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:52,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:52,565 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:52,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515 [2022-01-31 21:27:52,566 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:52,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1966402469, now seen corresponding path program 514 times [2022-01-31 21:27:52,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:52,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894140698] [2022-01-31 21:27:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:52,567 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:52,567 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:52,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:52,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:53,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:53,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:53,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894140698] [2022-01-31 21:27:53,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894140698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:53,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:53,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:53,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457656243] [2022-01-31 21:27:53,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:53,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:53,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:53,055 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:54,649 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-01-31 21:27:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:54,649 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:54,649 INFO L225 Difference]: With dead ends: 320 [2022-01-31 21:27:54,649 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:27:54,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:54,650 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:54,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 27 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:27:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 241. [2022-01-31 21:27:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-01-31 21:27:55,214 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 76 [2022-01-31 21:27:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:55,214 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-01-31 21:27:55,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-01-31 21:27:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:55,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:55,215 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:55,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516 [2022-01-31 21:27:55,239 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:55,239 INFO L85 PathProgramCache]: Analyzing trace with hash -175522853, now seen corresponding path program 515 times [2022-01-31 21:27:55,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:55,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588372468] [2022-01-31 21:27:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:55,240 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:55,240 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:55,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:55,241 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:55,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:55,704 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:55,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588372468] [2022-01-31 21:27:55,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [588372468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:55,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:55,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:55,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541823596] [2022-01-31 21:27:55,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:55,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:55,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:55,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:55,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:55,705 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:57,345 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-01-31 21:27:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:57,345 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:57,346 INFO L225 Difference]: With dead ends: 326 [2022-01-31 21:27:57,346 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:27:57,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:57,346 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:57,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:27:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 243. [2022-01-31 21:27:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-01-31 21:27:57,857 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 76 [2022-01-31 21:27:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:57,857 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-01-31 21:27:57,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-01-31 21:27:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:27:57,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:57,858 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:57,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517 [2022-01-31 21:27:57,858 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:57,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1422097573, now seen corresponding path program 516 times [2022-01-31 21:27:57,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:57,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487715012] [2022-01-31 21:27:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:57,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:27:57,859 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:27:57,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:57,859 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:58,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:58,333 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:58,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487715012] [2022-01-31 21:27:58,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487715012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:58,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:58,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:58,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215771104] [2022-01-31 21:27:58,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:58,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:58,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:58,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:58,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:58,334 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:59,986 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-01-31 21:27:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:27:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:59,987 INFO L225 Difference]: With dead ends: 332 [2022-01-31 21:27:59,987 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 21:27:59,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:59,988 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:59,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 21:28:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 245. [2022-01-31 21:28:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-01-31 21:28:00,568 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 76 [2022-01-31 21:28:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:00,568 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-01-31 21:28:00,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-01-31 21:28:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:00,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:00,568 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:00,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518 [2022-01-31 21:28:00,568 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1084527909, now seen corresponding path program 517 times [2022-01-31 21:28:00,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:00,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748635701] [2022-01-31 21:28:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:00,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:00,569 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:00,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:00,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:00,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:01,001 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:01,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748635701] [2022-01-31 21:28:01,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748635701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:01,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:01,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:01,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220368669] [2022-01-31 21:28:01,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:01,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:01,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:01,003 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:02,473 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-01-31 21:28:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:02,473 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:02,473 INFO L225 Difference]: With dead ends: 338 [2022-01-31 21:28:02,473 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 21:28:02,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:02,474 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:02,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:28:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 21:28:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 247. [2022-01-31 21:28:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-01-31 21:28:03,005 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 76 [2022-01-31 21:28:03,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:03,005 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-01-31 21:28:03,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-01-31 21:28:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:03,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:03,005 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:03,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519 [2022-01-31 21:28:03,005 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:03,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1197371995, now seen corresponding path program 518 times [2022-01-31 21:28:03,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:03,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131429241] [2022-01-31 21:28:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:03,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:03,006 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:03,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:03,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:03,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:03,488 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:03,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131429241] [2022-01-31 21:28:03,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1131429241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:03,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:03,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:03,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737489974] [2022-01-31 21:28:03,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:03,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:03,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:03,489 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:05,186 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-01-31 21:28:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:05,187 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:05,187 INFO L225 Difference]: With dead ends: 344 [2022-01-31 21:28:05,187 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 21:28:05,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:05,188 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:05,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 25 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 21:28:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 249. [2022-01-31 21:28:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-01-31 21:28:05,769 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 76 [2022-01-31 21:28:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:05,769 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-01-31 21:28:05,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:05,769 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-01-31 21:28:05,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:05,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:05,770 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:05,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520 [2022-01-31 21:28:05,770 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:05,770 INFO L85 PathProgramCache]: Analyzing trace with hash -625108517, now seen corresponding path program 519 times [2022-01-31 21:28:05,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:05,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558745320] [2022-01-31 21:28:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:05,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:05,771 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:05,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:05,771 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:06,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:06,323 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 21:28:06,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:06,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558745320] [2022-01-31 21:28:06,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [558745320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:06,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:06,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:06,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126211388] [2022-01-31 21:28:06,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:06,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:06,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:06,325 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:08,023 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-01-31 21:28:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:08,024 INFO L225 Difference]: With dead ends: 350 [2022-01-31 21:28:08,024 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 21:28:08,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:08,024 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:08,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:28:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 21:28:08,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 251. [2022-01-31 21:28:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.4878048780487805) internal successors, (366), 246 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 370 transitions. [2022-01-31 21:28:08,630 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 370 transitions. Word has length 76 [2022-01-31 21:28:08,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:08,630 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 370 transitions. [2022-01-31 21:28:08,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:08,631 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 370 transitions. [2022-01-31 21:28:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:08,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:08,631 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:08,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable521 [2022-01-31 21:28:08,631 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:08,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:08,631 INFO L85 PathProgramCache]: Analyzing trace with hash 317776219, now seen corresponding path program 520 times [2022-01-31 21:28:08,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:08,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370447415] [2022-01-31 21:28:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:08,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:08,632 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:08,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:08,633 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:09,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:09,074 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:09,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370447415] [2022-01-31 21:28:09,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [370447415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:09,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:09,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:09,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784261559] [2022-01-31 21:28:09,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:09,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:09,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:09,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:09,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:09,075 INFO L87 Difference]: Start difference. First operand 251 states and 370 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:10,803 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-01-31 21:28:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:10,803 INFO L225 Difference]: With dead ends: 356 [2022-01-31 21:28:10,803 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 21:28:10,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:10,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:10,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 21:28:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 253. [2022-01-31 21:28:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.4879032258064515) internal successors, (369), 248 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 373 transitions. [2022-01-31 21:28:11,370 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 373 transitions. Word has length 76 [2022-01-31 21:28:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:11,370 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 373 transitions. [2022-01-31 21:28:11,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 373 transitions. [2022-01-31 21:28:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:11,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:11,370 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:11,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522 [2022-01-31 21:28:11,370 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:11,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:11,371 INFO L85 PathProgramCache]: Analyzing trace with hash 191908059, now seen corresponding path program 521 times [2022-01-31 21:28:11,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:11,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993511686] [2022-01-31 21:28:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:11,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:11,372 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:11,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:11,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:11,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:11,836 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 21:28:11,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:11,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993511686] [2022-01-31 21:28:11,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993511686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:11,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:11,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:11,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260123704] [2022-01-31 21:28:11,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:11,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:11,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:11,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:11,837 INFO L87 Difference]: Start difference. First operand 253 states and 373 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:13,659 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-01-31 21:28:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:13,659 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:13,660 INFO L225 Difference]: With dead ends: 362 [2022-01-31 21:28:13,660 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 21:28:13,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:13,660 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:13,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:13,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 21:28:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 255. [2022-01-31 21:28:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.488) internal successors, (372), 250 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 376 transitions. [2022-01-31 21:28:14,262 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 376 transitions. Word has length 76 [2022-01-31 21:28:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:14,262 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 376 transitions. [2022-01-31 21:28:14,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 376 transitions. [2022-01-31 21:28:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:14,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:14,262 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:14,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523 [2022-01-31 21:28:14,262 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:14,263 INFO L85 PathProgramCache]: Analyzing trace with hash -508309413, now seen corresponding path program 522 times [2022-01-31 21:28:14,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:14,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267019507] [2022-01-31 21:28:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:14,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:14,264 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:14,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:14,264 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:14,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:14,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267019507] [2022-01-31 21:28:14,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267019507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:14,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:14,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:14,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607169888] [2022-01-31 21:28:14,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:14,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:14,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:14,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:14,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:14,749 INFO L87 Difference]: Start difference. First operand 255 states and 376 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:16,579 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-01-31 21:28:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:16,580 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:16,580 INFO L225 Difference]: With dead ends: 368 [2022-01-31 21:28:16,580 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 21:28:16,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:16,581 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:16,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 17 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 21:28:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 257. [2022-01-31 21:28:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 379 transitions. [2022-01-31 21:28:17,195 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 379 transitions. Word has length 76 [2022-01-31 21:28:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:17,195 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 379 transitions. [2022-01-31 21:28:17,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 379 transitions. [2022-01-31 21:28:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:17,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:17,196 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:17,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524 [2022-01-31 21:28:17,196 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash 892565467, now seen corresponding path program 523 times [2022-01-31 21:28:17,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:17,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40317643] [2022-01-31 21:28:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:17,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:17,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:17,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:17,197 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:17,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:17,679 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:17,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40317643] [2022-01-31 21:28:17,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [40317643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:17,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:17,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:17,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331092704] [2022-01-31 21:28:17,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:17,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:17,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:17,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:17,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:17,680 INFO L87 Difference]: Start difference. First operand 257 states and 379 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:19,513 INFO L93 Difference]: Finished difference Result 374 states and 551 transitions. [2022-01-31 21:28:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:19,513 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:19,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:19,513 INFO L225 Difference]: With dead ends: 374 [2022-01-31 21:28:19,514 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 21:28:19,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:19,514 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:19,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 29 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 21:28:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 259. [2022-01-31 21:28:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.4881889763779528) internal successors, (378), 254 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 382 transitions. [2022-01-31 21:28:20,110 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 382 transitions. Word has length 76 [2022-01-31 21:28:20,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:20,110 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 382 transitions. [2022-01-31 21:28:20,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 382 transitions. [2022-01-31 21:28:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:20,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:20,111 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:20,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525 [2022-01-31 21:28:20,111 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:20,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1486405797, now seen corresponding path program 524 times [2022-01-31 21:28:20,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:20,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650624809] [2022-01-31 21:28:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:20,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:20,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:20,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:20,112 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:20,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:20,599 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:20,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650624809] [2022-01-31 21:28:20,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [650624809] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:20,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:20,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:20,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358963148] [2022-01-31 21:28:20,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:20,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:20,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:20,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:20,600 INFO L87 Difference]: Start difference. First operand 259 states and 382 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:22,355 INFO L93 Difference]: Finished difference Result 380 states and 560 transitions. [2022-01-31 21:28:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:22,355 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:22,356 INFO L225 Difference]: With dead ends: 380 [2022-01-31 21:28:22,356 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 21:28:22,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:22,356 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:22,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:28:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 21:28:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 261. [2022-01-31 21:28:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.48828125) internal successors, (381), 256 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 385 transitions. [2022-01-31 21:28:22,958 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 385 transitions. Word has length 76 [2022-01-31 21:28:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:22,958 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 385 transitions. [2022-01-31 21:28:22,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 385 transitions. [2022-01-31 21:28:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:22,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:22,959 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:22,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526 [2022-01-31 21:28:22,959 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:22,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1539778267, now seen corresponding path program 525 times [2022-01-31 21:28:22,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:22,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167462581] [2022-01-31 21:28:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:22,960 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:22,960 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:22,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:22,961 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:23,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:23,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167462581] [2022-01-31 21:28:23,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [167462581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:23,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:23,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:23,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336125194] [2022-01-31 21:28:23,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:23,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:23,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:23,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:23,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:23,350 INFO L87 Difference]: Start difference. First operand 261 states and 385 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:25,108 INFO L93 Difference]: Finished difference Result 386 states and 569 transitions. [2022-01-31 21:28:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:25,109 INFO L225 Difference]: With dead ends: 386 [2022-01-31 21:28:25,109 INFO L226 Difference]: Without dead ends: 380 [2022-01-31 21:28:25,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:25,110 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:25,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:25,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-31 21:28:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 263. [2022-01-31 21:28:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.4883720930232558) internal successors, (384), 258 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 388 transitions. [2022-01-31 21:28:25,685 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 388 transitions. Word has length 76 [2022-01-31 21:28:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:25,685 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 388 transitions. [2022-01-31 21:28:25,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 388 transitions. [2022-01-31 21:28:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:25,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:25,685 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:25,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527 [2022-01-31 21:28:25,686 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:25,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2009804379, now seen corresponding path program 526 times [2022-01-31 21:28:25,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:25,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939014046] [2022-01-31 21:28:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:25,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:25,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:25,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:25,687 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:26,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:26,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939014046] [2022-01-31 21:28:26,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [939014046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:26,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:26,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:26,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345109401] [2022-01-31 21:28:26,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:26,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:26,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:26,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:26,155 INFO L87 Difference]: Start difference. First operand 263 states and 388 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:27,926 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-01-31 21:28:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:27,926 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:27,927 INFO L225 Difference]: With dead ends: 392 [2022-01-31 21:28:27,927 INFO L226 Difference]: Without dead ends: 386 [2022-01-31 21:28:27,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:27,927 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:27,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-31 21:28:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 265. [2022-01-31 21:28:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.4884615384615385) internal successors, (387), 260 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 391 transitions. [2022-01-31 21:28:28,499 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 391 transitions. Word has length 76 [2022-01-31 21:28:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:28,499 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 391 transitions. [2022-01-31 21:28:28,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 391 transitions. [2022-01-31 21:28:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:28:28,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:28,499 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:28,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528 [2022-01-31 21:28:28,500 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1561635365, now seen corresponding path program 527 times [2022-01-31 21:28:28,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:28,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71205310] [2022-01-31 21:28:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:28,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:28,501 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:28,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:28,501 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:28,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:28,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:28,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71205310] [2022-01-31 21:28:28,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [71205310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:28,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:28,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:28:28,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434372829] [2022-01-31 21:28:28,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:28,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:28:28,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:28,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:28:28,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:28:28,967 INFO L87 Difference]: Start difference. First operand 265 states and 391 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:30,358 INFO L93 Difference]: Finished difference Result 334 states and 491 transitions. [2022-01-31 21:28:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:28:30,358 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:28:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:30,358 INFO L225 Difference]: With dead ends: 334 [2022-01-31 21:28:30,358 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 21:28:30,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:28:30,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:30,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:28:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 21:28:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 205. [2022-01-31 21:28:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-01-31 21:28:30,734 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 76 [2022-01-31 21:28:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:30,734 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-01-31 21:28:30,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-01-31 21:28:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:30,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:30,735 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:30,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529 [2022-01-31 21:28:30,735 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:30,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1598211070, now seen corresponding path program 528 times [2022-01-31 21:28:30,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:30,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570901949] [2022-01-31 21:28:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:30,736 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:30,736 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:30,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:30,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:31,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:31,175 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:31,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570901949] [2022-01-31 21:28:31,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570901949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:31,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:31,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:31,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373264522] [2022-01-31 21:28:31,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:31,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:31,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:31,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:31,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:31,176 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:32,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:32,287 INFO L93 Difference]: Finished difference Result 220 states and 321 transitions. [2022-01-31 21:28:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:32,287 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:32,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:32,287 INFO L225 Difference]: With dead ends: 220 [2022-01-31 21:28:32,287 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 21:28:32,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:32,288 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:32,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 23 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:28:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 21:28:32,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2022-01-31 21:28:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-01-31 21:28:32,712 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 78 [2022-01-31 21:28:32,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:32,712 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-01-31 21:28:32,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-01-31 21:28:32,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:32,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:32,713 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:32,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530 [2022-01-31 21:28:32,713 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash 503262078, now seen corresponding path program 529 times [2022-01-31 21:28:32,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:32,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156533971] [2022-01-31 21:28:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:32,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:32,714 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:32,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:32,715 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:33,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:33,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:33,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156533971] [2022-01-31 21:28:33,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1156533971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:33,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:33,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:33,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608666087] [2022-01-31 21:28:33,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:33,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:33,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:33,172 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:34,488 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-01-31 21:28:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:34,488 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:34,489 INFO L225 Difference]: With dead ends: 224 [2022-01-31 21:28:34,489 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:28:34,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:34,489 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:34,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:34,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:28:34,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2022-01-31 21:28:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-01-31 21:28:34,895 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 78 [2022-01-31 21:28:34,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:34,895 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-01-31 21:28:34,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:34,895 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-01-31 21:28:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:34,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:34,896 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:34,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable531 [2022-01-31 21:28:34,896 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash 524268286, now seen corresponding path program 530 times [2022-01-31 21:28:34,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:34,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102510067] [2022-01-31 21:28:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:34,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:34,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:34,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:34,897 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:35,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:35,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102510067] [2022-01-31 21:28:35,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102510067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:35,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:35,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:35,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22247896] [2022-01-31 21:28:35,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:35,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:35,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:35,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:35,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:35,319 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:36,642 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:28:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:36,642 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:36,643 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:28:36,643 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:28:36,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:36,643 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:36,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:28:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 215. [2022-01-31 21:28:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-01-31 21:28:37,107 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 78 [2022-01-31 21:28:37,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:37,107 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-01-31 21:28:37,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-01-31 21:28:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:37,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:37,108 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:37,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable532 [2022-01-31 21:28:37,108 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:37,108 INFO L85 PathProgramCache]: Analyzing trace with hash -763602306, now seen corresponding path program 531 times [2022-01-31 21:28:37,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:37,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340929063] [2022-01-31 21:28:37,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:37,109 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:37,109 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:37,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:37,109 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:37,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:37,619 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:37,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340929063] [2022-01-31 21:28:37,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340929063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:37,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:37,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:37,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324830216] [2022-01-31 21:28:37,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:37,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:37,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:37,621 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:39,061 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:28:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:39,062 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:28:39,062 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:28:39,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:39,062 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:39,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 23 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:39,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:28:39,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 217. [2022-01-31 21:28:39,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-01-31 21:28:39,525 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 78 [2022-01-31 21:28:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:39,525 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-01-31 21:28:39,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-01-31 21:28:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:39,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:39,526 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:39,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533 [2022-01-31 21:28:39,526 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:39,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1456659970, now seen corresponding path program 532 times [2022-01-31 21:28:39,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:39,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568956422] [2022-01-31 21:28:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:39,527 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:39,527 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:39,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:39,528 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:40,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:40,037 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:40,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568956422] [2022-01-31 21:28:40,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568956422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:40,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:40,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:40,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703297613] [2022-01-31 21:28:40,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:40,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:40,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:40,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:40,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:40,038 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:41,365 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:28:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:41,365 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:28:41,366 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:28:41,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:41,366 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:41,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 23 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:28:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 219. [2022-01-31 21:28:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-01-31 21:28:41,852 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 78 [2022-01-31 21:28:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:41,852 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-01-31 21:28:41,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-01-31 21:28:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:41,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:41,852 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:41,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534 [2022-01-31 21:28:41,852 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1765144194, now seen corresponding path program 533 times [2022-01-31 21:28:41,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:41,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249343015] [2022-01-31 21:28:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:41,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:41,854 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:41,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:41,854 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:42,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:42,340 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:42,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249343015] [2022-01-31 21:28:42,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [249343015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:42,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:42,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:42,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600130923] [2022-01-31 21:28:42,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:42,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:42,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:42,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:42,341 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:43,592 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:28:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:43,592 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:28:43,592 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:28:43,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:43,593 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:43,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:28:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:28:44,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 221. [2022-01-31 21:28:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:44,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-01-31 21:28:44,038 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 78 [2022-01-31 21:28:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:44,038 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-01-31 21:28:44,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-01-31 21:28:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:44,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:44,039 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:44,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535 [2022-01-31 21:28:44,039 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:44,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:44,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1865740034, now seen corresponding path program 534 times [2022-01-31 21:28:44,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:44,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910582737] [2022-01-31 21:28:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:44,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:44,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:44,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:44,040 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:44,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:44,535 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:44,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910582737] [2022-01-31 21:28:44,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910582737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:44,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:44,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:44,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674073722] [2022-01-31 21:28:44,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:44,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:44,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:44,537 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:45,850 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:28:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:45,850 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:28:45,850 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:28:45,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:45,851 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:45,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 23 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:28:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 223. [2022-01-31 21:28:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-01-31 21:28:46,306 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 78 [2022-01-31 21:28:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:46,306 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-01-31 21:28:46,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-01-31 21:28:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:46,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:46,306 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:46,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536 [2022-01-31 21:28:46,306 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:46,306 INFO L85 PathProgramCache]: Analyzing trace with hash 245905534, now seen corresponding path program 535 times [2022-01-31 21:28:46,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:46,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619161775] [2022-01-31 21:28:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:46,307 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:46,307 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:46,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:46,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:46,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:46,796 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 21:28:46,796 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:46,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619161775] [2022-01-31 21:28:46,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1619161775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:46,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:46,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:46,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593114669] [2022-01-31 21:28:46,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:46,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:46,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:46,797 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:48,233 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:28:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:48,233 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:28:48,233 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:28:48,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:48,234 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:48,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:28:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 225. [2022-01-31 21:28:48,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-01-31 21:28:48,687 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 78 [2022-01-31 21:28:48,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:48,688 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-01-31 21:28:48,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:48,688 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-01-31 21:28:48,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:48,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:48,688 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:48,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537 [2022-01-31 21:28:48,688 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1982234626, now seen corresponding path program 536 times [2022-01-31 21:28:48,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:48,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277934860] [2022-01-31 21:28:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:48,689 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:48,690 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:48,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:48,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:49,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:49,181 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 21:28:49,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:49,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277934860] [2022-01-31 21:28:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1277934860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:49,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:49,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:49,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030759639] [2022-01-31 21:28:49,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:49,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:49,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:49,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:49,182 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:50,461 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:28:50,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:50,461 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:50,462 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:28:50,462 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:28:50,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:50,462 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:50,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:28:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:28:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 227. [2022-01-31 21:28:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-01-31 21:28:50,962 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 78 [2022-01-31 21:28:50,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:50,963 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-01-31 21:28:50,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:50,963 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-01-31 21:28:50,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:50,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:50,963 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:50,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538 [2022-01-31 21:28:50,963 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:50,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:50,963 INFO L85 PathProgramCache]: Analyzing trace with hash -36247682, now seen corresponding path program 537 times [2022-01-31 21:28:50,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:50,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514848960] [2022-01-31 21:28:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:50,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:50,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:50,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:50,965 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:51,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:51,471 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:51,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514848960] [2022-01-31 21:28:51,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514848960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:51,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:51,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:51,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024450148] [2022-01-31 21:28:51,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:51,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:51,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:51,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:51,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:51,472 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:52,999 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:28:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:53,000 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:28:53,000 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:28:53,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:53,000 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:53,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:28:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:28:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 229. [2022-01-31 21:28:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-01-31 21:28:53,478 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 78 [2022-01-31 21:28:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:53,478 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-01-31 21:28:53,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-01-31 21:28:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:53,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:53,479 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:53,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539 [2022-01-31 21:28:53,479 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:53,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1746431742, now seen corresponding path program 538 times [2022-01-31 21:28:53,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:53,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197594544] [2022-01-31 21:28:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:53,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:53,480 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:53,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:53,480 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:53,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:53,972 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:53,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197594544] [2022-01-31 21:28:53,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197594544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:53,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:53,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:53,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663770355] [2022-01-31 21:28:53,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:53,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:53,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:53,973 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:55,305 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:28:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:55,305 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:55,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:55,306 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:28:55,306 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:28:55,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:55,306 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:55,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 15 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:28:55,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:28:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 231. [2022-01-31 21:28:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-01-31 21:28:55,783 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 78 [2022-01-31 21:28:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:55,783 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-01-31 21:28:55,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-01-31 21:28:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:55,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:55,784 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:55,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540 [2022-01-31 21:28:55,784 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1209407102, now seen corresponding path program 539 times [2022-01-31 21:28:55,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:55,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156920860] [2022-01-31 21:28:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:55,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:55,785 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:55,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:55,785 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:56,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:56,237 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:56,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156920860] [2022-01-31 21:28:56,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [156920860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:56,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:56,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:56,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980881966] [2022-01-31 21:28:56,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:56,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:56,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:56,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:56,238 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:57,673 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:28:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:28:57,673 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:28:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:57,674 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:28:57,674 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:28:57,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:28:57,674 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:57,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:28:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:28:58,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 233. [2022-01-31 21:28:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-01-31 21:28:58,178 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 78 [2022-01-31 21:28:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:58,178 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-01-31 21:28:58,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-01-31 21:28:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:28:58,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:58,179 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:58,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541 [2022-01-31 21:28:58,179 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:58,179 INFO L85 PathProgramCache]: Analyzing trace with hash 524803582, now seen corresponding path program 540 times [2022-01-31 21:28:58,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:58,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188222626] [2022-01-31 21:28:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:58,180 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:28:58,180 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:28:58,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:58,181 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:28:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:58,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:58,675 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:58,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188222626] [2022-01-31 21:28:58,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1188222626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:58,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:58,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:28:58,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619529818] [2022-01-31 21:28:58,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:58,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:28:58,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:28:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:28:58,676 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:00,011 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:29:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:00,011 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:00,012 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:29:00,012 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:29:00,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:00,012 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:00,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:29:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:29:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 235. [2022-01-31 21:29:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-01-31 21:29:00,526 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 78 [2022-01-31 21:29:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:00,526 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-01-31 21:29:00,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-01-31 21:29:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:00,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:00,527 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:00,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542 [2022-01-31 21:29:00,527 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash -249182850, now seen corresponding path program 541 times [2022-01-31 21:29:00,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:00,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097703466] [2022-01-31 21:29:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:00,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:00,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:00,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:00,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:00,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:00,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:00,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097703466] [2022-01-31 21:29:00,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097703466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:00,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:00,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:00,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327754098] [2022-01-31 21:29:00,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:00,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:00,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:00,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:00,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:00,998 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:02,577 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:29:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:02,578 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:29:02,578 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:29:02,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:02,579 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:02,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:29:03,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 237. [2022-01-31 21:29:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-01-31 21:29:03,097 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 78 [2022-01-31 21:29:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:03,097 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-01-31 21:29:03,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-01-31 21:29:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:03,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:03,097 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:03,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543 [2022-01-31 21:29:03,097 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:03,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1020801794, now seen corresponding path program 542 times [2022-01-31 21:29:03,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:03,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294738530] [2022-01-31 21:29:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:03,098 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:03,099 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:03,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:03,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:03,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:03,584 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:03,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294738530] [2022-01-31 21:29:03,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294738530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:03,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:03,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:03,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715487219] [2022-01-31 21:29:03,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:03,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:03,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:03,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:03,585 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:05,171 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-01-31 21:29:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:05,171 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:05,172 INFO L225 Difference]: With dead ends: 302 [2022-01-31 21:29:05,172 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:29:05,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:05,172 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:05,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 29 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:29:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 239. [2022-01-31 21:29:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-01-31 21:29:05,721 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 78 [2022-01-31 21:29:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:05,721 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-01-31 21:29:05,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-01-31 21:29:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:05,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:05,722 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:05,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544 [2022-01-31 21:29:05,722 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash 482735230, now seen corresponding path program 543 times [2022-01-31 21:29:05,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:05,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009940456] [2022-01-31 21:29:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:05,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:05,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:05,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:05,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:06,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:06,166 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 21:29:06,166 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:06,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009940456] [2022-01-31 21:29:06,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009940456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:06,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:06,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:06,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37324484] [2022-01-31 21:29:06,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:06,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:06,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:06,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:06,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:06,168 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:07,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:07,820 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-01-31 21:29:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:07,820 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:07,820 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:29:07,821 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:29:07,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:07,821 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:07,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 29 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:07,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:29:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 241. [2022-01-31 21:29:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-01-31 21:29:08,351 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 78 [2022-01-31 21:29:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:08,351 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-01-31 21:29:08,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:08,351 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-01-31 21:29:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:08,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:08,352 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:08,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545 [2022-01-31 21:29:08,352 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:08,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:08,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2022163458, now seen corresponding path program 544 times [2022-01-31 21:29:08,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:08,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012216029] [2022-01-31 21:29:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:08,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:08,353 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:08,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:08,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:08,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:08,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:08,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012216029] [2022-01-31 21:29:08,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012216029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:08,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:08,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:08,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064337793] [2022-01-31 21:29:08,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:08,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:08,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:08,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:08,848 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:10,323 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-01-31 21:29:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:10,324 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:10,324 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:29:10,324 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:29:10,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:10,325 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:10,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 23 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:29:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:29:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 243. [2022-01-31 21:29:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-01-31 21:29:10,857 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 78 [2022-01-31 21:29:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:10,858 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-01-31 21:29:10,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-01-31 21:29:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:10,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:10,858 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:10,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546 [2022-01-31 21:29:10,858 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:10,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:10,858 INFO L85 PathProgramCache]: Analyzing trace with hash 246850430, now seen corresponding path program 545 times [2022-01-31 21:29:10,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:10,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857939612] [2022-01-31 21:29:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:10,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:10,859 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:10,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:10,860 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:11,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:11,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:11,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857939612] [2022-01-31 21:29:11,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857939612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:11,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:11,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:11,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103216529] [2022-01-31 21:29:11,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:11,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:11,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:11,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:11,184 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:12,704 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-01-31 21:29:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:12,704 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:12,705 INFO L225 Difference]: With dead ends: 320 [2022-01-31 21:29:12,705 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:29:12,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:12,705 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:12,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:29:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:29:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 245. [2022-01-31 21:29:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:13,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-01-31 21:29:13,296 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 78 [2022-01-31 21:29:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:13,297 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-01-31 21:29:13,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-01-31 21:29:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:13,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:13,297 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:13,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547 [2022-01-31 21:29:13,297 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:13,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1074189570, now seen corresponding path program 546 times [2022-01-31 21:29:13,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:13,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121794816] [2022-01-31 21:29:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:13,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:13,303 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:13,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:13,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:13,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:13,780 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 21:29:13,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:13,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121794816] [2022-01-31 21:29:13,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [121794816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:13,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:13,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:13,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538187451] [2022-01-31 21:29:13,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:13,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:13,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:13,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:13,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:13,781 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:15,478 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-01-31 21:29:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:15,478 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:15,479 INFO L225 Difference]: With dead ends: 326 [2022-01-31 21:29:15,479 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:29:15,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:15,479 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:15,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:29:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 247. [2022-01-31 21:29:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-01-31 21:29:16,027 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 78 [2022-01-31 21:29:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:16,027 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-01-31 21:29:16,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-01-31 21:29:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:16,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:16,027 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:16,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548 [2022-01-31 21:29:16,027 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:16,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:16,028 INFO L85 PathProgramCache]: Analyzing trace with hash 716690046, now seen corresponding path program 547 times [2022-01-31 21:29:16,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:16,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717548486] [2022-01-31 21:29:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:16,028 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:16,028 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:16,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:16,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:16,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:16,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:16,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717548486] [2022-01-31 21:29:16,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [717548486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:16,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:16,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:16,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271337093] [2022-01-31 21:29:16,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:16,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:16,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:16,515 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:18,224 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-01-31 21:29:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:18,225 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:18,225 INFO L225 Difference]: With dead ends: 332 [2022-01-31 21:29:18,225 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 21:29:18,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:18,226 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:18,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 21:29:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 249. [2022-01-31 21:29:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-01-31 21:29:18,826 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 78 [2022-01-31 21:29:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:18,827 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-01-31 21:29:18,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-01-31 21:29:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:18,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:18,827 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:18,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549 [2022-01-31 21:29:18,827 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash -529884674, now seen corresponding path program 548 times [2022-01-31 21:29:18,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:18,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937670508] [2022-01-31 21:29:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:18,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:18,828 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:18,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:18,829 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:19,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:19,340 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:19,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937670508] [2022-01-31 21:29:19,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937670508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:19,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:19,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:19,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860981013] [2022-01-31 21:29:19,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:19,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:19,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:19,342 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:21,087 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-01-31 21:29:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:21,088 INFO L225 Difference]: With dead ends: 338 [2022-01-31 21:29:21,088 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 21:29:21,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:21,088 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:21,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 31 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 21:29:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 251. [2022-01-31 21:29:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.4878048780487805) internal successors, (366), 246 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 370 transitions. [2022-01-31 21:29:21,690 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 370 transitions. Word has length 78 [2022-01-31 21:29:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:21,690 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 370 transitions. [2022-01-31 21:29:21,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 370 transitions. [2022-01-31 21:29:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:21,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:21,690 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:21,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550 [2022-01-31 21:29:21,691 INFO L402 AbstractCegarLoop]: === Iteration 552 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash -192315010, now seen corresponding path program 549 times [2022-01-31 21:29:21,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:21,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612927058] [2022-01-31 21:29:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:21,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:21,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:21,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:21,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:22,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:22,187 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612927058] [2022-01-31 21:29:22,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1612927058] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:22,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:22,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:22,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835699293] [2022-01-31 21:29:22,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:22,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:22,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:22,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:22,188 INFO L87 Difference]: Start difference. First operand 251 states and 370 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:23,991 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-01-31 21:29:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:23,991 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:23,992 INFO L225 Difference]: With dead ends: 344 [2022-01-31 21:29:23,992 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 21:29:23,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:23,992 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:23,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 21:29:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 253. [2022-01-31 21:29:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.4879032258064515) internal successors, (369), 248 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 373 transitions. [2022-01-31 21:29:24,616 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 373 transitions. Word has length 78 [2022-01-31 21:29:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:24,616 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 373 transitions. [2022-01-31 21:29:24,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:24,616 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 373 transitions. [2022-01-31 21:29:24,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:24,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:24,617 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:24,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551 [2022-01-31 21:29:24,617 INFO L402 AbstractCegarLoop]: === Iteration 553 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:24,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:24,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2089584894, now seen corresponding path program 550 times [2022-01-31 21:29:24,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:24,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097343851] [2022-01-31 21:29:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:24,618 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:24,618 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:24,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:24,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:25,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:25,130 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:25,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097343851] [2022-01-31 21:29:25,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097343851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:25,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:25,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:25,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631067099] [2022-01-31 21:29:25,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:25,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:25,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:25,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:25,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:25,131 INFO L87 Difference]: Start difference. First operand 253 states and 373 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:26,973 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-01-31 21:29:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:26,973 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:26,974 INFO L225 Difference]: With dead ends: 350 [2022-01-31 21:29:26,974 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 21:29:26,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:26,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:26,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 21:29:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 255. [2022-01-31 21:29:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.488) internal successors, (372), 250 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 376 transitions. [2022-01-31 21:29:27,582 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 376 transitions. Word has length 78 [2022-01-31 21:29:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:27,582 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 376 transitions. [2022-01-31 21:29:27,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 376 transitions. [2022-01-31 21:29:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:27,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:27,582 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:27,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552 [2022-01-31 21:29:27,582 INFO L402 AbstractCegarLoop]: === Iteration 554 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash 267104382, now seen corresponding path program 551 times [2022-01-31 21:29:27,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:27,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72383373] [2022-01-31 21:29:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:27,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:27,584 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:27,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:27,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:28,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:28,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:28,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72383373] [2022-01-31 21:29:28,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [72383373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:28,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:28,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:28,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200922842] [2022-01-31 21:29:28,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:28,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:28,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:28,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:28,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:28,102 INFO L87 Difference]: Start difference. First operand 255 states and 376 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:29,982 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-01-31 21:29:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:29,982 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:29,983 INFO L225 Difference]: With dead ends: 356 [2022-01-31 21:29:29,983 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 21:29:29,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:29,983 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:29,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 27 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 21:29:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 257. [2022-01-31 21:29:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 379 transitions. [2022-01-31 21:29:30,626 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 379 transitions. Word has length 78 [2022-01-31 21:29:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:30,626 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 379 transitions. [2022-01-31 21:29:30,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 379 transitions. [2022-01-31 21:29:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:30,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:30,627 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:30,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553 [2022-01-31 21:29:30,627 INFO L402 AbstractCegarLoop]: === Iteration 555 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:30,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:30,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1209989118, now seen corresponding path program 552 times [2022-01-31 21:29:30,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:30,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845495650] [2022-01-31 21:29:30,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:30,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:30,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:30,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:30,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:31,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:31,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:31,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845495650] [2022-01-31 21:29:31,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1845495650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:31,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:31,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:31,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99058914] [2022-01-31 21:29:31,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:31,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:31,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:31,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:31,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:31,146 INFO L87 Difference]: Start difference. First operand 257 states and 379 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:32,907 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-01-31 21:29:32,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:32,907 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:32,908 INFO L225 Difference]: With dead ends: 362 [2022-01-31 21:29:32,908 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 21:29:32,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:32,908 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:32,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 27 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 21:29:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 259. [2022-01-31 21:29:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.4881889763779528) internal successors, (378), 254 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 382 transitions. [2022-01-31 21:29:33,546 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 382 transitions. Word has length 78 [2022-01-31 21:29:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:33,546 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 382 transitions. [2022-01-31 21:29:33,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 382 transitions. [2022-01-31 21:29:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:33,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:33,547 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:33,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable554 [2022-01-31 21:29:33,547 INFO L402 AbstractCegarLoop]: === Iteration 556 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:33,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1084120958, now seen corresponding path program 553 times [2022-01-31 21:29:33,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:33,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650333098] [2022-01-31 21:29:33,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:33,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:33,548 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:33,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:33,553 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:34,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:34,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:34,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650333098] [2022-01-31 21:29:34,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650333098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:34,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:34,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:34,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536797540] [2022-01-31 21:29:34,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:34,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:34,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:34,049 INFO L87 Difference]: Start difference. First operand 259 states and 382 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:35,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:35,897 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-01-31 21:29:35,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:35,897 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:35,897 INFO L225 Difference]: With dead ends: 368 [2022-01-31 21:29:35,897 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 21:29:35,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:35,898 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:35,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 21:29:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 261. [2022-01-31 21:29:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.48828125) internal successors, (381), 256 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 385 transitions. [2022-01-31 21:29:36,527 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 385 transitions. Word has length 78 [2022-01-31 21:29:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:36,527 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 385 transitions. [2022-01-31 21:29:36,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:36,527 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 385 transitions. [2022-01-31 21:29:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:36,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:36,527 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:36,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555 [2022-01-31 21:29:36,527 INFO L402 AbstractCegarLoop]: === Iteration 557 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:36,528 INFO L85 PathProgramCache]: Analyzing trace with hash 383903486, now seen corresponding path program 554 times [2022-01-31 21:29:36,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:36,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909751149] [2022-01-31 21:29:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:36,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:36,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:36,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:36,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:37,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:37,023 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:37,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909751149] [2022-01-31 21:29:37,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [909751149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:37,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:37,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:37,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467038364] [2022-01-31 21:29:37,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:37,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:37,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:37,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:37,024 INFO L87 Difference]: Start difference. First operand 261 states and 385 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:38,852 INFO L93 Difference]: Finished difference Result 374 states and 551 transitions. [2022-01-31 21:29:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:38,853 INFO L225 Difference]: With dead ends: 374 [2022-01-31 21:29:38,853 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 21:29:38,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:38,853 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:38,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:38,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 21:29:39,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 263. [2022-01-31 21:29:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.4883720930232558) internal successors, (384), 258 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 388 transitions. [2022-01-31 21:29:39,464 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 388 transitions. Word has length 78 [2022-01-31 21:29:39,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:39,464 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 388 transitions. [2022-01-31 21:29:39,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:39,464 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 388 transitions. [2022-01-31 21:29:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:39,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:39,465 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:39,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556 [2022-01-31 21:29:39,465 INFO L402 AbstractCegarLoop]: === Iteration 558 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1784778366, now seen corresponding path program 555 times [2022-01-31 21:29:39,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:39,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316593773] [2022-01-31 21:29:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:39,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:39,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:39,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:39,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:39,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:39,950 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:39,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316593773] [2022-01-31 21:29:39,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1316593773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:39,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:39,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:39,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916071781] [2022-01-31 21:29:39,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:39,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:39,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:39,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:39,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:39,951 INFO L87 Difference]: Start difference. First operand 263 states and 388 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:41,921 INFO L93 Difference]: Finished difference Result 380 states and 560 transitions. [2022-01-31 21:29:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:41,921 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:41,921 INFO L225 Difference]: With dead ends: 380 [2022-01-31 21:29:41,922 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 21:29:41,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:41,922 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:41,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 21:29:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 265. [2022-01-31 21:29:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.4884615384615385) internal successors, (387), 260 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 391 transitions. [2022-01-31 21:29:42,572 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 391 transitions. Word has length 78 [2022-01-31 21:29:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:42,572 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 391 transitions. [2022-01-31 21:29:42,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 391 transitions. [2022-01-31 21:29:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:42,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:42,572 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:42,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557 [2022-01-31 21:29:42,572 INFO L402 AbstractCegarLoop]: === Iteration 559 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:42,573 INFO L85 PathProgramCache]: Analyzing trace with hash -594192898, now seen corresponding path program 556 times [2022-01-31 21:29:42,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:42,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833296864] [2022-01-31 21:29:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:42,573 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:42,573 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:42,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:42,574 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:43,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:43,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:43,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833296864] [2022-01-31 21:29:43,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833296864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:43,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:43,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:43,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745692925] [2022-01-31 21:29:43,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:43,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:43,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:43,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:43,081 INFO L87 Difference]: Start difference. First operand 265 states and 391 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:45,053 INFO L93 Difference]: Finished difference Result 386 states and 569 transitions. [2022-01-31 21:29:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:45,054 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:45,054 INFO L225 Difference]: With dead ends: 386 [2022-01-31 21:29:45,054 INFO L226 Difference]: Without dead ends: 380 [2022-01-31 21:29:45,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:45,055 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:45,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:45,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-31 21:29:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 267. [2022-01-31 21:29:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.4885496183206106) internal successors, (390), 262 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 394 transitions. [2022-01-31 21:29:45,736 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 394 transitions. Word has length 78 [2022-01-31 21:29:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:45,736 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 394 transitions. [2022-01-31 21:29:45,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 394 transitions. [2022-01-31 21:29:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:45,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:45,736 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:45,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable558 [2022-01-31 21:29:45,736 INFO L402 AbstractCegarLoop]: === Iteration 560 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1862976130, now seen corresponding path program 557 times [2022-01-31 21:29:45,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:45,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232735125] [2022-01-31 21:29:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:45,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:45,738 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:45,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:45,738 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:46,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:46,254 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232735125] [2022-01-31 21:29:46,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [232735125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:46,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:46,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:46,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807443277] [2022-01-31 21:29:46,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:46,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:46,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:46,255 INFO L87 Difference]: Start difference. First operand 267 states and 394 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:48,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:48,234 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-01-31 21:29:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:48,234 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:48,235 INFO L225 Difference]: With dead ends: 392 [2022-01-31 21:29:48,235 INFO L226 Difference]: Without dead ends: 386 [2022-01-31 21:29:48,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:48,235 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:48,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 29 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:48,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-31 21:29:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 269. [2022-01-31 21:29:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.4886363636363635) internal successors, (393), 264 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 397 transitions. [2022-01-31 21:29:48,986 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 397 transitions. Word has length 78 [2022-01-31 21:29:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:48,986 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 397 transitions. [2022-01-31 21:29:48,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 397 transitions. [2022-01-31 21:29:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:48,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:48,987 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:48,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559 [2022-01-31 21:29:48,987 INFO L402 AbstractCegarLoop]: === Iteration 561 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:48,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1392950018, now seen corresponding path program 558 times [2022-01-31 21:29:48,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:48,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507971585] [2022-01-31 21:29:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:48,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:48,989 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:48,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:48,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:49,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:49,507 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 21:29:49,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:49,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507971585] [2022-01-31 21:29:49,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [507971585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:49,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:49,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:49,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026543688] [2022-01-31 21:29:49,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:49,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:49,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:49,509 INFO L87 Difference]: Start difference. First operand 269 states and 397 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:51,522 INFO L93 Difference]: Finished difference Result 398 states and 587 transitions. [2022-01-31 21:29:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:51,522 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:51,523 INFO L225 Difference]: With dead ends: 398 [2022-01-31 21:29:51,523 INFO L226 Difference]: Without dead ends: 392 [2022-01-31 21:29:51,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:51,524 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:51,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-31 21:29:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 271. [2022-01-31 21:29:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.4887218045112782) internal successors, (396), 266 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 400 transitions. [2022-01-31 21:29:52,245 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 400 transitions. Word has length 78 [2022-01-31 21:29:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:52,245 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 400 transitions. [2022-01-31 21:29:52,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 400 transitions. [2022-01-31 21:29:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:52,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:52,245 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:52,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560 [2022-01-31 21:29:52,245 INFO L402 AbstractCegarLoop]: === Iteration 562 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:52,246 INFO L85 PathProgramCache]: Analyzing trace with hash -669422466, now seen corresponding path program 559 times [2022-01-31 21:29:52,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:52,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650361837] [2022-01-31 21:29:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:52,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:52,247 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:52,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:52,247 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:52,683 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 21:29:52,683 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:52,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650361837] [2022-01-31 21:29:52,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [650361837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:52,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:52,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:52,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680092628] [2022-01-31 21:29:52,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:52,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:52,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:52,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:52,684 INFO L87 Difference]: Start difference. First operand 271 states and 400 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:54,662 INFO L93 Difference]: Finished difference Result 404 states and 596 transitions. [2022-01-31 21:29:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:54,663 INFO L225 Difference]: With dead ends: 404 [2022-01-31 21:29:54,663 INFO L226 Difference]: Without dead ends: 398 [2022-01-31 21:29:54,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:54,663 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:54,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 23 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-31 21:29:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 273. [2022-01-31 21:29:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.4888059701492538) internal successors, (399), 268 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 403 transitions. [2022-01-31 21:29:55,377 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 403 transitions. Word has length 78 [2022-01-31 21:29:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:55,377 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 403 transitions. [2022-01-31 21:29:55,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 403 transitions. [2022-01-31 21:29:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:29:55,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:55,377 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:55,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561 [2022-01-31 21:29:55,378 INFO L402 AbstractCegarLoop]: === Iteration 563 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1144146946, now seen corresponding path program 560 times [2022-01-31 21:29:55,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:55,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248488064] [2022-01-31 21:29:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:55,379 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:55,379 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:55,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:55,379 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:55,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:55,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:55,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248488064] [2022-01-31 21:29:55,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248488064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:55,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:55,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:29:55,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260306665] [2022-01-31 21:29:55,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:55,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:29:55,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:55,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:29:55,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:29:55,917 INFO L87 Difference]: Start difference. First operand 273 states and 403 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:57,792 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-01-31 21:29:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:29:57,792 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:29:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:57,793 INFO L225 Difference]: With dead ends: 344 [2022-01-31 21:29:57,793 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 21:29:57,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:29:57,793 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:57,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 27 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:29:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 21:29:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 211. [2022-01-31 21:29:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:58,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-01-31 21:29:58,232 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 78 [2022-01-31 21:29:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:58,232 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-01-31 21:29:58,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-01-31 21:29:58,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:29:58,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:58,233 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:58,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562 [2022-01-31 21:29:58,233 INFO L402 AbstractCegarLoop]: === Iteration 564 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:58,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:58,233 INFO L85 PathProgramCache]: Analyzing trace with hash 21347809, now seen corresponding path program 561 times [2022-01-31 21:29:58,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:58,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089078233] [2022-01-31 21:29:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:58,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:29:58,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:29:58,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:58,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:29:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:58,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:58,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:58,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089078233] [2022-01-31 21:29:58,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089078233] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:58,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:58,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:29:58,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601010662] [2022-01-31 21:29:58,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:58,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:29:58,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:29:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:29:58,780 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:00,054 INFO L93 Difference]: Finished difference Result 226 states and 330 transitions. [2022-01-31 21:30:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:00,055 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:00,055 INFO L225 Difference]: With dead ends: 226 [2022-01-31 21:30:00,055 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 21:30:00,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:00,055 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:00,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 19 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:30:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 21:30:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 215. [2022-01-31 21:30:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-01-31 21:30:00,560 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 80 [2022-01-31 21:30:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:00,560 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-01-31 21:30:00,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-01-31 21:30:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:00,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:00,560 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:00,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563 [2022-01-31 21:30:00,561 INFO L402 AbstractCegarLoop]: === Iteration 565 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:00,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1073601183, now seen corresponding path program 562 times [2022-01-31 21:30:00,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:00,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129982293] [2022-01-31 21:30:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:00,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:00,562 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:00,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:00,562 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:01,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:01,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:01,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129982293] [2022-01-31 21:30:01,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2129982293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:01,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:01,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:01,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597239107] [2022-01-31 21:30:01,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:01,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:01,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:01,037 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:02,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:02,499 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-01-31 21:30:02,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:02,499 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:02,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:02,500 INFO L225 Difference]: With dead ends: 230 [2022-01-31 21:30:02,500 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:30:02,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:02,500 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:02,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 25 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:30:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 219. [2022-01-31 21:30:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-01-31 21:30:02,970 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 80 [2022-01-31 21:30:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:02,971 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-01-31 21:30:02,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-01-31 21:30:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:02,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:02,971 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:02,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564 [2022-01-31 21:30:02,971 INFO L402 AbstractCegarLoop]: === Iteration 566 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:02,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1052594975, now seen corresponding path program 563 times [2022-01-31 21:30:02,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:02,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476713939] [2022-01-31 21:30:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:02,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:02,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:02,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:02,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:03,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:03,432 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:03,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476713939] [2022-01-31 21:30:03,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476713939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:03,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:03,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:03,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502106013] [2022-01-31 21:30:03,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:03,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:03,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:03,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:03,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:03,433 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:04,978 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:30:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:04,978 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:04,979 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:30:04,979 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:30:04,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:04,979 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:04,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 21 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:30:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2022-01-31 21:30:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-01-31 21:30:05,503 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 80 [2022-01-31 21:30:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:05,503 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-01-31 21:30:05,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-01-31 21:30:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:05,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:05,503 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:05,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable565 [2022-01-31 21:30:05,504 INFO L402 AbstractCegarLoop]: === Iteration 567 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1954501729, now seen corresponding path program 564 times [2022-01-31 21:30:05,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:05,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876988542] [2022-01-31 21:30:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:05,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:05,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:05,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:05,507 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:06,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:06,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:06,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876988542] [2022-01-31 21:30:06,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876988542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:06,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:06,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:06,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001261767] [2022-01-31 21:30:06,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:06,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:06,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:06,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:06,086 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:07,654 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:30:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:07,655 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:07,655 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:30:07,655 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:30:07,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:07,656 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:07,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 29 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:30:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 223. [2022-01-31 21:30:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-01-31 21:30:08,181 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 80 [2022-01-31 21:30:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:08,181 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-01-31 21:30:08,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-01-31 21:30:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:08,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:08,182 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:08,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566 [2022-01-31 21:30:08,182 INFO L402 AbstractCegarLoop]: === Iteration 568 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:08,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1261444065, now seen corresponding path program 565 times [2022-01-31 21:30:08,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:08,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147188955] [2022-01-31 21:30:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:08,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:08,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:08,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:08,183 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:08,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:08,532 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 21:30:08,533 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147188955] [2022-01-31 21:30:08,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147188955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:08,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:08,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:08,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224031804] [2022-01-31 21:30:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:08,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:08,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:08,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:08,534 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:09,924 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:30:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:09,925 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:09,925 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:30:09,925 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:30:09,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:09,926 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:09,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 21 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:30:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:30:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 225. [2022-01-31 21:30:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-01-31 21:30:10,442 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 80 [2022-01-31 21:30:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:10,442 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-01-31 21:30:10,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-01-31 21:30:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:10,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:10,443 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:10,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567 [2022-01-31 21:30:10,443 INFO L402 AbstractCegarLoop]: === Iteration 569 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:10,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:10,443 INFO L85 PathProgramCache]: Analyzing trace with hash 952959841, now seen corresponding path program 566 times [2022-01-31 21:30:10,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:10,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370542568] [2022-01-31 21:30:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:10,444 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:10,444 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:10,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:10,444 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:10,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:10,915 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:10,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370542568] [2022-01-31 21:30:10,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370542568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:10,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:10,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:10,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144447099] [2022-01-31 21:30:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:10,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:10,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:10,916 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:12,409 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:30:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:12,410 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:12,410 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:30:12,410 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:30:12,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:12,411 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:12,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 17 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:30:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 227. [2022-01-31 21:30:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-01-31 21:30:12,977 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 80 [2022-01-31 21:30:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:12,977 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-01-31 21:30:12,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-01-31 21:30:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:12,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:12,977 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:12,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568 [2022-01-31 21:30:12,977 INFO L402 AbstractCegarLoop]: === Iteration 570 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:12,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:12,978 INFO L85 PathProgramCache]: Analyzing trace with hash 852364001, now seen corresponding path program 567 times [2022-01-31 21:30:12,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:12,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306501564] [2022-01-31 21:30:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:12,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:12,979 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:12,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:12,979 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:13,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:13,531 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:13,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306501564] [2022-01-31 21:30:13,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [306501564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:13,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:13,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:13,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739868950] [2022-01-31 21:30:13,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:13,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:13,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:13,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:13,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:13,533 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:15,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:15,227 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:30:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:15,228 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:30:15,228 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:30:15,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:15,228 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:15,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 29 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:30:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 229. [2022-01-31 21:30:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-01-31 21:30:15,798 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 80 [2022-01-31 21:30:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:15,798 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-01-31 21:30:15,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-01-31 21:30:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:15,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:15,799 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:15,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569 [2022-01-31 21:30:15,799 INFO L402 AbstractCegarLoop]: === Iteration 571 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1330957727, now seen corresponding path program 568 times [2022-01-31 21:30:15,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:15,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66251464] [2022-01-31 21:30:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:15,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:15,800 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:15,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:15,801 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:16,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:16,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:16,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66251464] [2022-01-31 21:30:16,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [66251464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:16,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:16,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:16,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140839907] [2022-01-31 21:30:16,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:16,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:16,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:16,282 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:17,789 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:30:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:17,789 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:17,789 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:30:17,790 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:30:17,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:17,790 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:17,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 17 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:17,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:30:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 231. [2022-01-31 21:30:18,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-01-31 21:30:18,396 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 80 [2022-01-31 21:30:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:18,396 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-01-31 21:30:18,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-01-31 21:30:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:18,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:18,396 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:18,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570 [2022-01-31 21:30:18,396 INFO L402 AbstractCegarLoop]: === Iteration 572 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:18,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:18,396 INFO L85 PathProgramCache]: Analyzing trace with hash 735869409, now seen corresponding path program 569 times [2022-01-31 21:30:18,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:18,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190861102] [2022-01-31 21:30:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:18,397 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:18,397 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:18,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:18,398 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:18,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:18,918 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:18,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190861102] [2022-01-31 21:30:18,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190861102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:18,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:18,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:18,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845547158] [2022-01-31 21:30:18,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:18,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:18,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:18,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:18,919 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:20,406 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-01-31 21:30:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:20,406 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:20,407 INFO L225 Difference]: With dead ends: 272 [2022-01-31 21:30:20,407 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 21:30:20,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:20,407 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:20,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 25 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 21:30:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 233. [2022-01-31 21:30:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-01-31 21:30:20,993 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 80 [2022-01-31 21:30:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:20,994 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-01-31 21:30:20,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-01-31 21:30:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:20,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:20,994 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:20,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571 [2022-01-31 21:30:20,994 INFO L402 AbstractCegarLoop]: === Iteration 573 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1613110943, now seen corresponding path program 570 times [2022-01-31 21:30:20,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:20,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676757737] [2022-01-31 21:30:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:20,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:20,995 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:20,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:20,996 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:21,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:21,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:21,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676757737] [2022-01-31 21:30:21,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [676757737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:21,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:21,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:21,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686413203] [2022-01-31 21:30:21,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:21,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:21,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:21,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:21,554 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:23,071 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-01-31 21:30:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:23,071 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:23,072 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:30:23,072 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:30:23,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:23,072 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:23,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 27 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:30:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 235. [2022-01-31 21:30:23,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-01-31 21:30:23,670 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 80 [2022-01-31 21:30:23,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:23,670 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-01-31 21:30:23,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:23,670 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-01-31 21:30:23,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:23,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:23,670 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:23,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572 [2022-01-31 21:30:23,671 INFO L402 AbstractCegarLoop]: === Iteration 574 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:23,671 INFO L85 PathProgramCache]: Analyzing trace with hash 169568481, now seen corresponding path program 571 times [2022-01-31 21:30:23,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:23,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852213434] [2022-01-31 21:30:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:23,672 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:23,672 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:23,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:23,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:24,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:24,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:24,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852213434] [2022-01-31 21:30:24,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [852213434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:24,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:24,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:24,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17568534] [2022-01-31 21:30:24,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:24,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:24,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:24,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:24,050 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:25,544 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-01-31 21:30:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:25,544 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:25,544 INFO L225 Difference]: With dead ends: 284 [2022-01-31 21:30:25,544 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 21:30:25,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:25,545 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:25,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 25 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:30:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 21:30:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 237. [2022-01-31 21:30:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-01-31 21:30:26,155 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 80 [2022-01-31 21:30:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:26,155 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-01-31 21:30:26,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-01-31 21:30:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:26,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:26,156 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:26,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable573 [2022-01-31 21:30:26,156 INFO L402 AbstractCegarLoop]: === Iteration 575 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:26,156 INFO L85 PathProgramCache]: Analyzing trace with hash -367456159, now seen corresponding path program 572 times [2022-01-31 21:30:26,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:26,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978366742] [2022-01-31 21:30:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:26,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:26,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:26,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:26,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:26,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:26,707 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:26,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978366742] [2022-01-31 21:30:26,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1978366742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:26,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:26,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:26,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167849893] [2022-01-31 21:30:26,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:26,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:26,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:26,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:26,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:26,708 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:28,322 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-01-31 21:30:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:28,322 INFO L225 Difference]: With dead ends: 290 [2022-01-31 21:30:28,322 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:30:28,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:28,323 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:28,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 19 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:30:28,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 239. [2022-01-31 21:30:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-01-31 21:30:28,919 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 80 [2022-01-31 21:30:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:28,920 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-01-31 21:30:28,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-01-31 21:30:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:28,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:28,920 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:28,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574 [2022-01-31 21:30:28,920 INFO L402 AbstractCegarLoop]: === Iteration 576 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1052059679, now seen corresponding path program 573 times [2022-01-31 21:30:28,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:28,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867926948] [2022-01-31 21:30:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:28,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:28,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:28,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:28,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:29,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:29,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:29,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867926948] [2022-01-31 21:30:29,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [867926948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:29,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:29,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:29,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853035746] [2022-01-31 21:30:29,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:29,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:29,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:29,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:29,461 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:31,325 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-01-31 21:30:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:31,325 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:31,326 INFO L225 Difference]: With dead ends: 296 [2022-01-31 21:30:31,326 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 21:30:31,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:31,349 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:31,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 21 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 21:30:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 241. [2022-01-31 21:30:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-01-31 21:30:31,961 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 80 [2022-01-31 21:30:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:31,962 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-01-31 21:30:31,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-01-31 21:30:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:31,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:31,962 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:31,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable575 [2022-01-31 21:30:31,962 INFO L402 AbstractCegarLoop]: === Iteration 577 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:31,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1826046111, now seen corresponding path program 574 times [2022-01-31 21:30:31,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:31,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37237020] [2022-01-31 21:30:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:31,963 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:31,963 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:31,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:31,964 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:32,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:32,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:32,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37237020] [2022-01-31 21:30:32,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [37237020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:32,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:32,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:32,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517081176] [2022-01-31 21:30:32,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:32,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:32,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:32,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:32,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:32,519 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:34,155 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-01-31 21:30:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:34,156 INFO L225 Difference]: With dead ends: 302 [2022-01-31 21:30:34,156 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:30:34,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:34,156 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:34,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 23 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:30:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 243. [2022-01-31 21:30:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-01-31 21:30:34,764 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 80 [2022-01-31 21:30:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:34,764 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-01-31 21:30:34,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-01-31 21:30:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:34,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:34,764 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:34,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable576 [2022-01-31 21:30:34,764 INFO L402 AbstractCegarLoop]: === Iteration 578 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:34,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1697302241, now seen corresponding path program 575 times [2022-01-31 21:30:34,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:34,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180561433] [2022-01-31 21:30:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:34,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:34,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:34,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:34,766 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:35,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:35,204 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 21:30:35,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:35,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180561433] [2022-01-31 21:30:35,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [180561433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:35,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:35,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:35,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325623735] [2022-01-31 21:30:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:35,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:35,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:35,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:35,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:35,205 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:36,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:36,976 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-01-31 21:30:36,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:36,976 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:36,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:36,977 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:30:36,977 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:30:36,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:36,977 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:36,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 27 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:30:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 245. [2022-01-31 21:30:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-01-31 21:30:37,581 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 80 [2022-01-31 21:30:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:37,581 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-01-31 21:30:37,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-01-31 21:30:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:37,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:37,581 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:37,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577 [2022-01-31 21:30:37,581 INFO L402 AbstractCegarLoop]: === Iteration 579 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:37,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1094128031, now seen corresponding path program 576 times [2022-01-31 21:30:37,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:37,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588583546] [2022-01-31 21:30:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:37,582 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:37,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:37,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:37,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:38,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:38,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:38,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588583546] [2022-01-31 21:30:38,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [588583546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:38,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:38,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:38,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146287462] [2022-01-31 21:30:38,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:38,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:38,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:38,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:38,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:38,042 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:39,876 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-01-31 21:30:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:39,876 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:39,876 INFO L225 Difference]: With dead ends: 314 [2022-01-31 21:30:39,877 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:30:39,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:39,877 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:39,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 23 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:30:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 247. [2022-01-31 21:30:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-01-31 21:30:40,547 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 80 [2022-01-31 21:30:40,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:40,547 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-01-31 21:30:40,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-01-31 21:30:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:40,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:40,548 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:40,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578 [2022-01-31 21:30:40,548 INFO L402 AbstractCegarLoop]: === Iteration 580 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash 695940577, now seen corresponding path program 577 times [2022-01-31 21:30:40,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:40,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56280888] [2022-01-31 21:30:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:40,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:40,549 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:40,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:40,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:41,026 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 21:30:41,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56280888] [2022-01-31 21:30:41,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [56280888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:41,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:41,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:41,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244306450] [2022-01-31 21:30:41,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:41,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:41,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:41,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:41,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:41,028 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:42,925 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-01-31 21:30:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:42,926 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:42,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:42,926 INFO L225 Difference]: With dead ends: 320 [2022-01-31 21:30:42,926 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:30:42,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:42,927 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:42,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 21 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:30:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 249. [2022-01-31 21:30:43,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-01-31 21:30:43,561 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 80 [2022-01-31 21:30:43,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:43,561 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-01-31 21:30:43,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:43,562 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-01-31 21:30:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:43,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:43,562 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:43,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579 [2022-01-31 21:30:43,562 INFO L402 AbstractCegarLoop]: === Iteration 581 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:43,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1330012831, now seen corresponding path program 578 times [2022-01-31 21:30:43,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:43,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576683675] [2022-01-31 21:30:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:43,563 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:43,563 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:43,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:43,564 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:44,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:44,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:44,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576683675] [2022-01-31 21:30:44,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [576683675] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:44,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:44,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:44,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296217630] [2022-01-31 21:30:44,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:44,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:44,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:44,097 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:45,773 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-01-31 21:30:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:45,773 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:45,773 INFO L225 Difference]: With dead ends: 326 [2022-01-31 21:30:45,773 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:30:45,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:45,774 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:45,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 21 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:30:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 251. [2022-01-31 21:30:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.4878048780487805) internal successors, (366), 246 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 370 transitions. [2022-01-31 21:30:46,448 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 370 transitions. Word has length 80 [2022-01-31 21:30:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:46,448 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 370 transitions. [2022-01-31 21:30:46,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 370 transitions. [2022-01-31 21:30:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:46,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:46,449 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:46,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580 [2022-01-31 21:30:46,449 INFO L402 AbstractCegarLoop]: === Iteration 582 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1643914465, now seen corresponding path program 579 times [2022-01-31 21:30:46,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:46,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796189199] [2022-01-31 21:30:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:46,450 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:46,450 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:46,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:46,451 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:46,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:46,827 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:46,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796189199] [2022-01-31 21:30:46,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1796189199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:46,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:46,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:46,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113775375] [2022-01-31 21:30:46,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:46,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:46,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:46,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:46,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:46,828 INFO L87 Difference]: Start difference. First operand 251 states and 370 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:48,790 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-01-31 21:30:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:48,790 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:48,791 INFO L225 Difference]: With dead ends: 332 [2022-01-31 21:30:48,791 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 21:30:48,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:48,791 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:48,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 17 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 21:30:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 253. [2022-01-31 21:30:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.4879032258064515) internal successors, (369), 248 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 373 transitions. [2022-01-31 21:30:49,488 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 373 transitions. Word has length 80 [2022-01-31 21:30:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:49,488 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 373 transitions. [2022-01-31 21:30:49,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 373 transitions. [2022-01-31 21:30:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:49,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:49,488 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:49,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581 [2022-01-31 21:30:49,489 INFO L402 AbstractCegarLoop]: === Iteration 583 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash -860173215, now seen corresponding path program 580 times [2022-01-31 21:30:49,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:49,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324297623] [2022-01-31 21:30:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:49,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:49,490 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:49,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:49,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:50,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:50,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:50,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324297623] [2022-01-31 21:30:50,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324297623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:50,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:50,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:50,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099585066] [2022-01-31 21:30:50,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:50,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:50,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:50,041 INFO L87 Difference]: Start difference. First operand 253 states and 373 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:51,946 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-01-31 21:30:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:51,947 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:51,947 INFO L225 Difference]: With dead ends: 338 [2022-01-31 21:30:51,947 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 21:30:51,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:51,948 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:51,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 21 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 21:30:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 255. [2022-01-31 21:30:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.488) internal successors, (372), 250 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 376 transitions. [2022-01-31 21:30:52,655 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 376 transitions. Word has length 80 [2022-01-31 21:30:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:52,655 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 376 transitions. [2022-01-31 21:30:52,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 376 transitions. [2022-01-31 21:30:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:52,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:52,656 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:52,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582 [2022-01-31 21:30:52,656 INFO L402 AbstractCegarLoop]: === Iteration 584 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:52,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:52,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2106747935, now seen corresponding path program 581 times [2022-01-31 21:30:52,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:52,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124366807] [2022-01-31 21:30:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:52,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:52,657 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:52,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:52,657 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:53,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:53,175 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:53,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124366807] [2022-01-31 21:30:53,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [124366807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:53,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:53,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:53,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265748338] [2022-01-31 21:30:53,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:53,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:53,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:53,177 INFO L87 Difference]: Start difference. First operand 255 states and 376 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:55,139 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-01-31 21:30:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:55,140 INFO L225 Difference]: With dead ends: 344 [2022-01-31 21:30:55,140 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 21:30:55,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:55,141 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:55,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 25 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 21:30:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 257. [2022-01-31 21:30:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 379 transitions. [2022-01-31 21:30:55,861 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 379 transitions. Word has length 80 [2022-01-31 21:30:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:55,861 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 379 transitions. [2022-01-31 21:30:55,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 379 transitions. [2022-01-31 21:30:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:55,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:55,862 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:55,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583 [2022-01-31 21:30:55,862 INFO L402 AbstractCegarLoop]: === Iteration 585 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1769178271, now seen corresponding path program 582 times [2022-01-31 21:30:55,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:55,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613594980] [2022-01-31 21:30:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:55,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:55,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:55,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:55,863 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:56,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:56,384 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:56,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613594980] [2022-01-31 21:30:56,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1613594980] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:56,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:56,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:56,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213560320] [2022-01-31 21:30:56,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:56,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:56,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:56,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:56,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:56,385 INFO L87 Difference]: Start difference. First operand 257 states and 379 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:58,316 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-01-31 21:30:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:30:58,316 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:30:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:58,317 INFO L225 Difference]: With dead ends: 350 [2022-01-31 21:30:58,317 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 21:30:58,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:58,317 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:58,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 25 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:30:58,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 21:30:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2022-01-31 21:30:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.4881889763779528) internal successors, (378), 254 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 382 transitions. [2022-01-31 21:30:59,071 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 382 transitions. Word has length 80 [2022-01-31 21:30:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:59,071 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 382 transitions. [2022-01-31 21:30:59,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 382 transitions. [2022-01-31 21:30:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:30:59,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:59,072 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:59,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584 [2022-01-31 21:30:59,072 INFO L402 AbstractCegarLoop]: === Iteration 586 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash 512721633, now seen corresponding path program 583 times [2022-01-31 21:30:59,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:59,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632171782] [2022-01-31 21:30:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:59,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:30:59,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:30:59,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:59,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:30:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:59,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:59,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:59,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632171782] [2022-01-31 21:30:59,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [632171782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:59,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:59,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:30:59,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914988515] [2022-01-31 21:30:59,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:59,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:30:59,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:59,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:30:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:30:59,627 INFO L87 Difference]: Start difference. First operand 259 states and 382 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:01,844 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-01-31 21:31:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:01,845 INFO L225 Difference]: With dead ends: 356 [2022-01-31 21:31:01,845 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 21:31:01,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:01,846 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:01,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 23 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 21:31:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 261. [2022-01-31 21:31:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.48828125) internal successors, (381), 256 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 385 transitions. [2022-01-31 21:31:02,577 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 385 transitions. Word has length 80 [2022-01-31 21:31:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:02,577 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 385 transitions. [2022-01-31 21:31:02,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 385 transitions. [2022-01-31 21:31:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:02,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:02,577 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:02,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585 [2022-01-31 21:31:02,577 INFO L402 AbstractCegarLoop]: === Iteration 587 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:02,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:02,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1309758879, now seen corresponding path program 584 times [2022-01-31 21:31:02,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:02,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174673193] [2022-01-31 21:31:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:02,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:02,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:02,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:02,579 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:03,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:03,129 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:03,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174673193] [2022-01-31 21:31:03,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174673193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:03,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:03,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:03,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941560568] [2022-01-31 21:31:03,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:03,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:03,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:03,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:03,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:03,130 INFO L87 Difference]: Start difference. First operand 261 states and 385 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:05,085 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-01-31 21:31:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:05,086 INFO L225 Difference]: With dead ends: 362 [2022-01-31 21:31:05,086 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 21:31:05,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:05,086 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:05,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 21 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 21:31:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 263. [2022-01-31 21:31:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.4883720930232558) internal successors, (384), 258 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 388 transitions. [2022-01-31 21:31:05,755 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 388 transitions. Word has length 80 [2022-01-31 21:31:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:05,755 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 388 transitions. [2022-01-31 21:31:05,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 388 transitions. [2022-01-31 21:31:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:05,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:05,756 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:05,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586 [2022-01-31 21:31:05,756 INFO L402 AbstractCegarLoop]: === Iteration 588 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash -366874143, now seen corresponding path program 585 times [2022-01-31 21:31:05,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:05,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159258120] [2022-01-31 21:31:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:05,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:05,757 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:05,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:05,757 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:06,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:06,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:06,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159258120] [2022-01-31 21:31:06,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [159258120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:06,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:06,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:06,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204581046] [2022-01-31 21:31:06,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:06,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:06,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:06,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:06,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:06,246 INFO L87 Difference]: Start difference. First operand 263 states and 388 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:08,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:08,323 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-01-31 21:31:08,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:08,323 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:08,324 INFO L225 Difference]: With dead ends: 368 [2022-01-31 21:31:08,324 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 21:31:08,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:08,324 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:08,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 19 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 21:31:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 265. [2022-01-31 21:31:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.4884615384615385) internal successors, (387), 260 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 391 transitions. [2022-01-31 21:31:09,053 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 391 transitions. Word has length 80 [2022-01-31 21:31:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:09,053 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 391 transitions. [2022-01-31 21:31:09,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 391 transitions. [2022-01-31 21:31:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:09,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:09,054 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:09,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable587 [2022-01-31 21:31:09,054 INFO L402 AbstractCegarLoop]: === Iteration 589 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:09,054 INFO L85 PathProgramCache]: Analyzing trace with hash -492742303, now seen corresponding path program 586 times [2022-01-31 21:31:09,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:09,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778074544] [2022-01-31 21:31:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:09,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:09,055 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:09,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:09,056 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:09,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:09,606 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:09,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778074544] [2022-01-31 21:31:09,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [778074544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:09,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:09,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:09,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759143870] [2022-01-31 21:31:09,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:09,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:09,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:09,607 INFO L87 Difference]: Start difference. First operand 265 states and 391 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:11,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:11,793 INFO L93 Difference]: Finished difference Result 374 states and 551 transitions. [2022-01-31 21:31:11,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:11,793 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:11,794 INFO L225 Difference]: With dead ends: 374 [2022-01-31 21:31:11,794 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 21:31:11,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:11,794 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:11,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 17 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:11,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 21:31:12,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 267. [2022-01-31 21:31:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.4885496183206106) internal successors, (390), 262 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 394 transitions. [2022-01-31 21:31:12,583 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 394 transitions. Word has length 80 [2022-01-31 21:31:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:12,583 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 394 transitions. [2022-01-31 21:31:12,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 394 transitions. [2022-01-31 21:31:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:12,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:12,583 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:12,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588 [2022-01-31 21:31:12,584 INFO L402 AbstractCegarLoop]: === Iteration 590 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1192959775, now seen corresponding path program 587 times [2022-01-31 21:31:12,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:12,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143702897] [2022-01-31 21:31:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:12,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:12,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:12,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:12,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:13,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:13,151 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:13,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143702897] [2022-01-31 21:31:13,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143702897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:13,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:13,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:13,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431916907] [2022-01-31 21:31:13,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:13,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:13,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:13,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:13,153 INFO L87 Difference]: Start difference. First operand 267 states and 394 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:15,177 INFO L93 Difference]: Finished difference Result 380 states and 560 transitions. [2022-01-31 21:31:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:15,178 INFO L225 Difference]: With dead ends: 380 [2022-01-31 21:31:15,178 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 21:31:15,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:15,179 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:15,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 19 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:15,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 21:31:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 269. [2022-01-31 21:31:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.4886363636363635) internal successors, (393), 264 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 397 transitions. [2022-01-31 21:31:15,898 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 397 transitions. Word has length 80 [2022-01-31 21:31:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:15,898 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 397 transitions. [2022-01-31 21:31:15,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 397 transitions. [2022-01-31 21:31:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:15,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:15,898 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:15,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589 [2022-01-31 21:31:15,898 INFO L402 AbstractCegarLoop]: === Iteration 591 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:15,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:15,899 INFO L85 PathProgramCache]: Analyzing trace with hash 207915105, now seen corresponding path program 588 times [2022-01-31 21:31:15,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:15,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301330766] [2022-01-31 21:31:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:15,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:15,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:15,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:15,900 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:16,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:16,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:16,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301330766] [2022-01-31 21:31:16,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [301330766] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:16,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:16,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:16,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518500360] [2022-01-31 21:31:16,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:16,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:16,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:16,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:16,456 INFO L87 Difference]: Start difference. First operand 269 states and 397 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:18,417 INFO L93 Difference]: Finished difference Result 386 states and 569 transitions. [2022-01-31 21:31:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:18,417 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:18,418 INFO L225 Difference]: With dead ends: 386 [2022-01-31 21:31:18,418 INFO L226 Difference]: Without dead ends: 380 [2022-01-31 21:31:18,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:18,418 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:18,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 29 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-31 21:31:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 271. [2022-01-31 21:31:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.4887218045112782) internal successors, (396), 266 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:19,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 400 transitions. [2022-01-31 21:31:19,106 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 400 transitions. Word has length 80 [2022-01-31 21:31:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:19,107 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 400 transitions. [2022-01-31 21:31:19,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 400 transitions. [2022-01-31 21:31:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:19,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:19,107 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:19,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590 [2022-01-31 21:31:19,107 INFO L402 AbstractCegarLoop]: === Iteration 592 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2123911137, now seen corresponding path program 589 times [2022-01-31 21:31:19,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647050888] [2022-01-31 21:31:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:19,108 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:19,108 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:19,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:19,109 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:19,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:19,451 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:19,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647050888] [2022-01-31 21:31:19,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [647050888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:19,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:19,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:19,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585837384] [2022-01-31 21:31:19,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:19,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:19,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:19,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:19,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:19,452 INFO L87 Difference]: Start difference. First operand 271 states and 400 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:21,607 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-01-31 21:31:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:21,608 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:21,609 INFO L225 Difference]: With dead ends: 392 [2022-01-31 21:31:21,609 INFO L226 Difference]: Without dead ends: 386 [2022-01-31 21:31:21,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:21,609 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:21,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 23 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-31 21:31:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 273. [2022-01-31 21:31:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.4888059701492538) internal successors, (399), 268 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 403 transitions. [2022-01-31 21:31:22,411 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 403 transitions. Word has length 80 [2022-01-31 21:31:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:22,411 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 403 transitions. [2022-01-31 21:31:22,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 403 transitions. [2022-01-31 21:31:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:22,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:22,411 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:22,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591 [2022-01-31 21:31:22,411 INFO L402 AbstractCegarLoop]: === Iteration 593 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:22,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:22,412 INFO L85 PathProgramCache]: Analyzing trace with hash 855127905, now seen corresponding path program 590 times [2022-01-31 21:31:22,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:22,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279868503] [2022-01-31 21:31:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:22,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:22,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:22,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:22,413 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:22,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:22,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:22,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279868503] [2022-01-31 21:31:22,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [279868503] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:22,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:22,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:22,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406572994] [2022-01-31 21:31:22,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:22,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:22,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:22,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:22,976 INFO L87 Difference]: Start difference. First operand 273 states and 403 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:25,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:25,024 INFO L93 Difference]: Finished difference Result 398 states and 587 transitions. [2022-01-31 21:31:25,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:25,024 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:25,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:25,024 INFO L225 Difference]: With dead ends: 398 [2022-01-31 21:31:25,024 INFO L226 Difference]: Without dead ends: 392 [2022-01-31 21:31:25,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:25,025 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:25,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 19 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-31 21:31:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 275. [2022-01-31 21:31:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.488888888888889) internal successors, (402), 270 states have internal predecessors, (402), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 406 transitions. [2022-01-31 21:31:25,807 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 406 transitions. Word has length 80 [2022-01-31 21:31:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:25,808 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 406 transitions. [2022-01-31 21:31:25,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 406 transitions. [2022-01-31 21:31:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:25,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:25,808 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:25,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592 [2022-01-31 21:31:25,808 INFO L402 AbstractCegarLoop]: === Iteration 594 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:25,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1325154017, now seen corresponding path program 591 times [2022-01-31 21:31:25,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:25,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120080971] [2022-01-31 21:31:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:25,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:25,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:25,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:25,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:26,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:26,317 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 21:31:26,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:26,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120080971] [2022-01-31 21:31:26,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [120080971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:26,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:26,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:26,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462945655] [2022-01-31 21:31:26,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:26,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:26,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:26,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:26,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:26,321 INFO L87 Difference]: Start difference. First operand 275 states and 406 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:28,618 INFO L93 Difference]: Finished difference Result 404 states and 596 transitions. [2022-01-31 21:31:28,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:28,618 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:28,619 INFO L225 Difference]: With dead ends: 404 [2022-01-31 21:31:28,619 INFO L226 Difference]: Without dead ends: 398 [2022-01-31 21:31:28,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:28,619 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:28,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 23 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-31 21:31:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 277. [2022-01-31 21:31:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.4889705882352942) internal successors, (405), 272 states have internal predecessors, (405), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 409 transitions. [2022-01-31 21:31:29,364 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 409 transitions. Word has length 80 [2022-01-31 21:31:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:29,364 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 409 transitions. [2022-01-31 21:31:29,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 409 transitions. [2022-01-31 21:31:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:29,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:29,364 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:29,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593 [2022-01-31 21:31:29,365 INFO L402 AbstractCegarLoop]: === Iteration 595 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:29,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2048681569, now seen corresponding path program 592 times [2022-01-31 21:31:29,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:29,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713190808] [2022-01-31 21:31:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:29,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:29,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:29,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:29,368 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:29,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:29,923 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:29,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713190808] [2022-01-31 21:31:29,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [713190808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:29,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:29,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:29,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234234264] [2022-01-31 21:31:29,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:29,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:29,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:29,924 INFO L87 Difference]: Start difference. First operand 277 states and 409 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:31,996 INFO L93 Difference]: Finished difference Result 410 states and 605 transitions. [2022-01-31 21:31:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:31,997 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:31,997 INFO L225 Difference]: With dead ends: 410 [2022-01-31 21:31:31,997 INFO L226 Difference]: Without dead ends: 404 [2022-01-31 21:31:31,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:31,998 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:31,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 19 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-31 21:31:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 279. [2022-01-31 21:31:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.489051094890511) internal successors, (408), 274 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 412 transitions. [2022-01-31 21:31:32,691 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 412 transitions. Word has length 80 [2022-01-31 21:31:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:32,692 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 412 transitions. [2022-01-31 21:31:32,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 412 transitions. [2022-01-31 21:31:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:32,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:32,692 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:32,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594 [2022-01-31 21:31:32,692 INFO L402 AbstractCegarLoop]: === Iteration 596 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1573957089, now seen corresponding path program 593 times [2022-01-31 21:31:32,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:32,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116227298] [2022-01-31 21:31:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:32,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:32,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:32,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:32,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:33,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:33,226 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:33,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116227298] [2022-01-31 21:31:33,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116227298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:33,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:33,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:33,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843434270] [2022-01-31 21:31:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:33,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:33,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:33,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:33,228 INFO L87 Difference]: Start difference. First operand 279 states and 412 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:35,341 INFO L93 Difference]: Finished difference Result 416 states and 614 transitions. [2022-01-31 21:31:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:35,342 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:35,342 INFO L225 Difference]: With dead ends: 416 [2022-01-31 21:31:35,342 INFO L226 Difference]: Without dead ends: 410 [2022-01-31 21:31:35,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:35,343 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:35,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 23 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-31 21:31:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 281. [2022-01-31 21:31:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.4891304347826086) internal successors, (411), 276 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 415 transitions. [2022-01-31 21:31:36,091 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 415 transitions. Word has length 80 [2022-01-31 21:31:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:36,091 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 415 transitions. [2022-01-31 21:31:36,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 415 transitions. [2022-01-31 21:31:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:31:36,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:36,092 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:36,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595 [2022-01-31 21:31:36,092 INFO L402 AbstractCegarLoop]: === Iteration 597 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash 630265185, now seen corresponding path program 594 times [2022-01-31 21:31:36,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:36,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405259194] [2022-01-31 21:31:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:36,093 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:36,093 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:36,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:36,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:36,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:36,598 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405259194] [2022-01-31 21:31:36,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405259194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:36,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:36,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:31:36,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850984629] [2022-01-31 21:31:36,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:36,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:31:36,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:31:36,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:31:36,599 INFO L87 Difference]: Start difference. First operand 281 states and 415 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:38,430 INFO L93 Difference]: Finished difference Result 354 states and 521 transitions. [2022-01-31 21:31:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:31:38,430 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:31:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:38,431 INFO L225 Difference]: With dead ends: 354 [2022-01-31 21:31:38,431 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 21:31:38,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:31:38,431 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:38,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 29 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 21:31:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 217. [2022-01-31 21:31:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-01-31 21:31:38,932 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 80 [2022-01-31 21:31:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:38,933 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-01-31 21:31:38,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-01-31 21:31:38,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:31:38,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:38,933 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:38,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596 [2022-01-31 21:31:38,933 INFO L402 AbstractCegarLoop]: === Iteration 598 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:38,933 INFO L85 PathProgramCache]: Analyzing trace with hash 779209476, now seen corresponding path program 595 times [2022-01-31 21:31:38,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:38,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62050712] [2022-01-31 21:31:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:38,934 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:38,934 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:38,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:38,935 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:39,490 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:39,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62050712] [2022-01-31 21:31:39,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [62050712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:39,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:39,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:31:39,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719898031] [2022-01-31 21:31:39,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:39,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:31:39,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:39,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:31:39,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:31:39,491 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:41,190 INFO L93 Difference]: Finished difference Result 232 states and 339 transitions. [2022-01-31 21:31:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:31:41,191 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 21:31:41,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:41,191 INFO L225 Difference]: With dead ends: 232 [2022-01-31 21:31:41,191 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 21:31:41,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2188, Invalid=3664, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:31:41,192 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 124 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:41,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 21 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 21:31:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 221. [2022-01-31 21:31:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-01-31 21:31:41,734 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 82 [2022-01-31 21:31:41,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:41,734 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-01-31 21:31:41,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-01-31 21:31:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:31:41,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:41,734 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:41,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable597 [2022-01-31 21:31:41,735 INFO L402 AbstractCegarLoop]: === Iteration 599 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:41,735 INFO L85 PathProgramCache]: Analyzing trace with hash -315739516, now seen corresponding path program 596 times [2022-01-31 21:31:41,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:41,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505538303] [2022-01-31 21:31:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:41,736 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:41,736 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:41,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:41,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:42,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:42,323 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 21:31:42,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505538303] [2022-01-31 21:31:42,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1505538303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:42,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:42,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:31:42,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621800055] [2022-01-31 21:31:42,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:42,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:31:42,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:31:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:31:42,324 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:44,000 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-01-31 21:31:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:31:44,000 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 21:31:44,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:44,001 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:31:44,001 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:31:44,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2188, Invalid=3664, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:31:44,001 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:44,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 23 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:31:44,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2022-01-31 21:31:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-01-31 21:31:44,596 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 82 [2022-01-31 21:31:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:44,596 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-01-31 21:31:44,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-01-31 21:31:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:31:44,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:44,597 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:44,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable598 [2022-01-31 21:31:44,597 INFO L402 AbstractCegarLoop]: === Iteration 600 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:44,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash -294733308, now seen corresponding path program 597 times [2022-01-31 21:31:44,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:44,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602630822] [2022-01-31 21:31:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:44,598 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:44,598 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:44,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:44,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:45,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:45,126 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:45,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602630822] [2022-01-31 21:31:45,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602630822] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:45,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:45,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:31:45,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195520431] [2022-01-31 21:31:45,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:45,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:31:45,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:31:45,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:31:45,127 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:46,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:46,468 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-01-31 21:31:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:31:46,469 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 21:31:46,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:46,469 INFO L225 Difference]: With dead ends: 242 [2022-01-31 21:31:46,469 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:31:46,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2188, Invalid=3664, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:31:46,470 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:46,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 23 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:31:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 227. [2022-01-31 21:31:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-01-31 21:31:47,097 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 82 [2022-01-31 21:31:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:47,097 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-01-31 21:31:47,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-01-31 21:31:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:31:47,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:47,098 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:47,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599 [2022-01-31 21:31:47,098 INFO L402 AbstractCegarLoop]: === Iteration 601 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1582603900, now seen corresponding path program 598 times [2022-01-31 21:31:47,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:47,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127221794] [2022-01-31 21:31:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:47,099 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:47,099 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:47,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:47,100 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:47,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:47,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127221794] [2022-01-31 21:31:47,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2127221794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:47,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:47,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:31:47,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759725576] [2022-01-31 21:31:47,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:47,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:31:47,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:47,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:31:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:31:47,471 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:48,900 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-01-31 21:31:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:31:48,901 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 21:31:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:48,901 INFO L225 Difference]: With dead ends: 248 [2022-01-31 21:31:48,901 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 21:31:48,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2188, Invalid=3664, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:31:48,902 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:48,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 21 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:31:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 21:31:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 229. [2022-01-31 21:31:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-01-31 21:31:49,464 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 82 [2022-01-31 21:31:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:49,465 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-01-31 21:31:49,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-01-31 21:31:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:31:49,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:49,465 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:49,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600 [2022-01-31 21:31:49,465 INFO L402 AbstractCegarLoop]: === Iteration 602 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:49,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2019305732, now seen corresponding path program 599 times [2022-01-31 21:31:49,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:49,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233665786] [2022-01-31 21:31:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:49,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:49,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:49,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:49,467 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:49,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:49,989 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:49,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233665786] [2022-01-31 21:31:49,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1233665786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:49,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:49,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:31:49,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410397790] [2022-01-31 21:31:49,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:49,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:31:49,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:31:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:31:49,990 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:51,626 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-01-31 21:31:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:31:51,626 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 21:31:51,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:51,626 INFO L225 Difference]: With dead ends: 254 [2022-01-31 21:31:51,626 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:31:51,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2188, Invalid=3664, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:31:51,627 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:51,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 19 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:31:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 231. [2022-01-31 21:31:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-01-31 21:31:52,245 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 82 [2022-01-31 21:31:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:52,246 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-01-31 21:31:52,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-01-31 21:31:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:31:52,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:52,246 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:52,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601 [2022-01-31 21:31:52,246 INFO L402 AbstractCegarLoop]: === Iteration 603 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:52,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1710821508, now seen corresponding path program 600 times [2022-01-31 21:31:52,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:52,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717950577] [2022-01-31 21:31:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:52,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:52,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:52,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:52,248 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:52,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:52,829 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:52,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717950577] [2022-01-31 21:31:52,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717950577] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:52,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:52,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:31:52,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715039579] [2022-01-31 21:31:52,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:52,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:31:52,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:52,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:31:52,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:31:52,830 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:54,591 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-01-31 21:31:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:31:54,592 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 21:31:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:54,592 INFO L225 Difference]: With dead ends: 260 [2022-01-31 21:31:54,592 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 21:31:54,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2188, Invalid=3664, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:31:54,593 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:54,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 21 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 21:31:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 233. [2022-01-31 21:31:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-01-31 21:31:55,202 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 82 [2022-01-31 21:31:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:55,202 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-01-31 21:31:55,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-01-31 21:31:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:31:55,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:55,203 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:55,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602 [2022-01-31 21:31:55,203 INFO L402 AbstractCegarLoop]: === Iteration 604 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1610225668, now seen corresponding path program 601 times [2022-01-31 21:31:55,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:55,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243280834] [2022-01-31 21:31:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:55,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:55,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:55,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:55,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:55,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:55,727 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:55,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243280834] [2022-01-31 21:31:55,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243280834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:55,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:55,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:31:55,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855776813] [2022-01-31 21:31:55,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:55,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:31:55,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:55,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:31:55,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:31:55,728 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:57,353 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-01-31 21:31:57,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:31:57,353 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 21:31:57,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:57,354 INFO L225 Difference]: With dead ends: 266 [2022-01-31 21:31:57,354 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:31:57,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2188, Invalid=3664, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:31:57,354 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:57,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 19 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:31:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:31:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 235. [2022-01-31 21:31:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-01-31 21:31:57,890 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 82 [2022-01-31 21:31:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:57,891 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-01-31 21:31:57,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-01-31 21:31:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:31:57,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:57,891 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:57,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603 [2022-01-31 21:31:57,891 INFO L402 AbstractCegarLoop]: === Iteration 605 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash -573096060, now seen corresponding path program 602 times [2022-01-31 21:31:57,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:57,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470992517] [2022-01-31 21:31:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:57,892 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:31:57,892 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 21:31:57,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:57,893 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:31:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:58,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:58,369 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:58,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470992517] [2022-01-31 21:31:58,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470992517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:58,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:58,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:31:58,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712290188] [2022-01-31 21:31:58,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:58,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:31:58,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:58,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:31:58,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:31:58,371 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)